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1156 vulnerabilities by xen
CVE-2026-42488 (GCVE-0-2026-42488)
Vulnerability from cvelistv5 – Published: 2026-06-18 13:47 – Updated: 2026-06-18 15:07
VLAI
Title
x86: mismatched mapcache metadata
Summary
Some shadow paging errors paths will switch the page-tables without
updating the currently running vCPU reference. This causes a mismatch
between the loaded page-tables and the mapcache metadata which can lead
to corruption of the mapcache.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Date Public
2026-06-09 12:00
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-42488",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-18T15:02:17.385668Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-119",
"description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-18T15:03:20.373Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2026-06-18T15:07:35.190Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://xenbits.xen.org/xsa/advisory-494.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/06/09/14"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-494"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "Xen 4.15 and onwards are vulnerable. Any Xen version with the fix for\nXSA-438 applied is vulnerable.\n\nOnly x86 systems are vulnerable. Only 64-bit PV guests can leverage the\nvulnerability, and only when running in shadow mode. Shadow mode would\nbe in use when migrating guests or as a workaround for XSA-273 (L1TF)."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Roger Pau Monn\u00e9 of XenServer."
}
],
"datePublic": "2026-06-09T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Some shadow paging errors paths will switch the page-tables without\nupdating the currently running vCPU reference. This causes a mismatch\nbetween the loaded page-tables and the mapcache metadata which can lead\nto corruption of the mapcache."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "Privilege escalation, Denial of Service (DoS) affecting the entire host,\nand information leaks."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-18T13:47:23.838Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-494.html"
}
],
"title": "x86: mismatched mapcache metadata",
"workarounds": [
{
"lang": "en",
"value": "Running only HVM or PVH guests will avoid the vulnerability.\n\nRunning PV guests in the PV shim will also avoid the vulnerability."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-42488",
"datePublished": "2026-06-18T13:47:23.838Z",
"dateReserved": "2026-04-27T14:20:24.138Z",
"dateUpdated": "2026-06-18T15:07:35.190Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-42490 (GCVE-0-2026-42490)
Vulnerability from cvelistv5 – Published: 2026-06-18 13:47 – Updated: 2026-06-18 15:04
VLAI
Title
domctl lock open to abuse
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
To create and manage guests, domctl operations are used by the control
domain, a possible Xenstore domain, or by a domain controlling a
particular guest. Some of these operations may not be executed in
parallel, so a system-wide lock is used. The way that lock is acquired
is, however, not providing any fairness. This is CVE-2026-42489.
Furthermore, with XSM/Flask in use, the lock acquire will, for some
operations, occur ahead of any permission checking. This is
CVE-2026-42490.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-667 - Improper Locking
Assigner
References
1 reference
Date Public
2026-06-09 12:00
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-42490",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-18T15:04:47.308725Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-667",
"description": "CWE-667 Improper Locking",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-18T15:04:50.692Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-492"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "All Xen versions from 3.3 onwards are vulnerable. Earlier versions use\na different locking operation, but may also be vulnerable."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Andrew Cooper of Citrix."
}
],
"datePublic": "2026-06-09T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nTo create and manage guests, domctl operations are used by the control\ndomain, a possible Xenstore domain, or by a domain controlling a\nparticular guest. Some of these operations may not be executed in\nparallel, so a system-wide lock is used. The way that lock is acquired\nis, however, not providing any fairness. This is CVE-2026-42489.\n\nFurthermore, with XSM/Flask in use, the lock acquire will, for some\noperations, occur ahead of any permission checking. This is\nCVE-2026-42490."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A less privileged entity may stall an equally or more privileged entity,\npotentially leading to a Denial od Service (DoS) of up to the entire\nhost."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-18T13:47:13.257Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-492.html"
}
],
"title": "domctl lock open to abuse",
"workarounds": [
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"lang": "en",
"value": "There is no known mitigation."
}
]
}
},
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"assignerShortName": "XEN",
"cveId": "CVE-2026-42490",
"datePublished": "2026-06-18T13:47:13.257Z",
"dateReserved": "2026-04-27T14:20:24.139Z",
"dateUpdated": "2026-06-18T15:04:50.692Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-42489 (GCVE-0-2026-42489)
Vulnerability from cvelistv5 – Published: 2026-06-18 13:47 – Updated: 2026-06-18 15:04
VLAI
Title
domctl lock open to abuse
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
To create and manage guests, domctl operations are used by the control
domain, a possible Xenstore domain, or by a domain controlling a
particular guest. Some of these operations may not be executed in
parallel, so a system-wide lock is used. The way that lock is acquired
is, however, not providing any fairness. This is CVE-2026-42489.
Furthermore, with XSM/Flask in use, the lock acquire will, for some
operations, occur ahead of any permission checking. This is
CVE-2026-42490.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-667 - Improper Locking
Assigner
References
1 reference
Date Public
2026-06-09 12:00
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-42489",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-18T15:04:27.888372Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-667",
"description": "CWE-667 Improper Locking",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-18T15:04:32.591Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-492"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "All Xen versions from 3.3 onwards are vulnerable. Earlier versions use\na different locking operation, but may also be vulnerable."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Andrew Cooper of Citrix."
}
],
"datePublic": "2026-06-09T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nTo create and manage guests, domctl operations are used by the control\ndomain, a possible Xenstore domain, or by a domain controlling a\nparticular guest. Some of these operations may not be executed in\nparallel, so a system-wide lock is used. The way that lock is acquired\nis, however, not providing any fairness. This is CVE-2026-42489.\n\nFurthermore, with XSM/Flask in use, the lock acquire will, for some\noperations, occur ahead of any permission checking. This is\nCVE-2026-42490."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A less privileged entity may stall an equally or more privileged entity,\npotentially leading to a Denial od Service (DoS) of up to the entire\nhost."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-18T13:47:13.198Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-492.html"
}
],
"title": "domctl lock open to abuse",
"workarounds": [
{
"lang": "en",
"value": "There is no known mitigation."
}
]
}
},
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"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-42489",
"datePublished": "2026-06-18T13:47:13.198Z",
"dateReserved": "2026-04-27T14:20:24.139Z",
"dateUpdated": "2026-06-18T15:04:32.591Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-42487 (GCVE-0-2026-42487)
Vulnerability from cvelistv5 – Published: 2026-06-18 13:46 – Updated: 2026-06-18 15:07
VLAI
Title
x86 HVM I/O port list traversal
Summary
HVM guest I/O port accesses are subject to either emulation or at least
translation. Translations are managed by the device model (via
XEN_DOMCTL_ioport_mapping), and hence the linked list used may changed
at any time. Traversal of those lists (while handling guest I/O port
accesses) therefore needs synchronizing with updates, which was missing
so far.
Severity
7.9 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Date Public
2026-06-09 12:00
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.9,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-42487",
"options": [
{
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},
{
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-18T14:35:06.701148Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
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{
"cweId": "CWE-362",
"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-18T14:35:11.262Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2026-06-18T15:07:31.335Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://xenbits.xen.org/xsa/advisory-491.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/06/09/11"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-491"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "All Xen versions from at least 3.2 onwards are vulnerable. Earlier\nversions have not been inspected.\n\nOnly x86 systems are vulnerable. Arm systems are not vulnerable.\n\nOnly entities controlling HVM guests can leverage the vulnerability.\nThese are device models running in either a stub domain or de-privileged\nin Dom0."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Jan Beulich of SUSE."
}
],
"datePublic": "2026-06-09T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "HVM guest I/O port accesses are subject to either emulation or at least\ntranslation. Translations are managed by the device model (via\nXEN_DOMCTL_ioport_mapping), and hence the linked list used may changed\nat any time. Traversal of those lists (while handling guest I/O port\naccesses) therefore needs synchronizing with updates, which was missing\nso far."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A device model of a HVM guest can cause a hypervisor crash, causing a\nDenial of Service (DoS) of the entire host. Privilege escalation and\ninformation leaks cannot be ruled out."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-18T13:46:53.459Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-491.html"
}
],
"title": "x86 HVM I/O port list traversal",
"workarounds": [
{
"lang": "en",
"value": "Running only PV or PVH guests will avoid the vulnerability.\n\n(Switching from a device model stub domain or a de-privileged device\nmodel to a fully privileged Dom0 device model does NOT mitigate this\nvulnerability. Rather, it simply recategorises the vulnerability to\nhostile management code, regarding it \"as designed\"; thus it merely\nreclassifies these issues as \"not a bug\". The security of a Xen system\nusing stub domains is still better than with a qemu-dm running as a Dom0\nprocess. Users and vendors of stub qemu dm systems should not change\ntheir configuration to use a Dom0 qemu process.)"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-42487",
"datePublished": "2026-06-18T13:46:53.459Z",
"dateReserved": "2026-04-27T14:20:24.138Z",
"dateUpdated": "2026-06-18T15:07:31.335Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-23558 (GCVE-0-2026-23558)
Vulnerability from cvelistv5 – Published: 2026-05-19 12:49 – Updated: 2026-05-20 03:55
VLAI
Title
grant table v2 race in status page mapping
Summary
The adjustments made for XSA-379 as well as those subsequently becoming
XSA-387 still left a race window, when a HVM or PVH guest does a grant
table version change from v2 to v1 in parallel with mapping the status
page(s) via XENMEM_add_to_physmap. Some of the status pages may then be
freed while mappings of them would still be inserted into the guest's
secondary (P2M) page tables.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Date Public
2026-04-28 12:00
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-05-19T13:06:51.044Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/04/28/13"
},
{
"url": "http://xenbits.xen.org/xsa/advisory-486.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-23558",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-19T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-362",
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"value": "All Xen versions from 4.0 onwards are affected. Xen versions 3.4 and\nolder are not affected.\n\nOnly x86 HVM and PVH guests permitted to use grant table version 2\ninterfaces can leverage this vulnerability. x86 PV guests cannot\nleverage this vulnerability. On Arm, grant table v2 use is explicitly\nunsupported."
}
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}
],
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CVE-2026-23557 (GCVE-0-2026-23557)
Vulnerability from cvelistv5 – Published: 2026-05-19 12:49 – Updated: 2026-05-19 14:42
VLAI
Title
Xenstored DoS via XS_RESET_WATCHES command
Summary
Any guest can cause xenstored to crash by issuing a XS_RESET_WATCHES
command within a transaction due to an assert() triggering.
In case xenstored was built with NDEBUG #defined nothing bad will
happen, as assert() is doing nothing in this case. Note that the
default is not to define NDEBUG for xenstored builds even in release
builds of Xen.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-617 - Reachable Assertion
Assigner
References
Date Public
2026-04-28 12:00
Credits
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CVE-2026-23555 (GCVE-0-2026-23555)
Vulnerability from cvelistv5 – Published: 2026-03-23 06:57 – Updated: 2026-03-23 14:14
VLAI
Title
Xenstored DoS by unprivileged domain
Summary
Any guest issuing a Xenstore command accessing a node using the
(illegal) node path "/local/domain/", will crash xenstored due to a
clobbered error indicator in xenstored when verifying the node path.
Note that the crash is forced via a failing assert() statement in
xenstored. In case xenstored is being built with NDEBUG #defined,
an unprivileged guest trying to access the node path "/local/domain/"
will result in it no longer being serviced by xenstored, other guests
(including dom0) will still be serviced, but xenstored will use up
all cpu time it can get.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-617 - Reachable Assertion
Assigner
References
Date Public
2026-03-17 12:00
Credits
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CVE-2026-23554 (GCVE-0-2026-23554)
Vulnerability from cvelistv5 – Published: 2026-03-23 06:56 – Updated: 2026-03-23 14:19
VLAI
Title
Use after free of paging structures in EPT
Summary
The Intel EPT paging code uses an optimization to defer flushing of any cached
EPT state until the p2m lock is dropped, so that multiple modifications done
under the same locked region only issue a single flush.
Freeing of paging structures however is not deferred until the flushing is
done, and can result in freed pages transiently being present in cached state.
Such stale entries can point to memory ranges not owned by the guest, thus
allowing access to unintended memory regions.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Date Public
2026-03-17 12:00
Credits
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CVE-2026-23553 (GCVE-0-2026-23553)
Vulnerability from cvelistv5 – Published: 2026-01-28 15:33 – Updated: 2026-01-28 16:41
VLAI
Title
x86: incomplete IBPB for vCPU isolation
Summary
In the context switch logic Xen attempts to skip an IBPB in the case of
a vCPU returning to a CPU on which it was the previous vCPU to run.
While safe for Xen's isolation between vCPUs, this prevents the guest
kernel correctly isolating between tasks. Consider:
1) vCPU runs on CPU A, running task 1.
2) vCPU moves to CPU B, idle gets scheduled on A. Xen skips IBPB.
3) On CPU B, guest kernel switches from task 1 to 2, issuing IBPB.
4) vCPU moves back to CPU A. Xen skips IBPB again.
Now, task 2 is running on CPU A with task 1's training still in the BTB.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Date Public
2026-01-27 12:00
Credits
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"descriptions": [
{
"lang": "en",
"value": "In the context switch logic Xen attempts to skip an IBPB in the case of\na vCPU returning to a CPU on which it was the previous vCPU to run.\nWhile safe for Xen\u0027s isolation between vCPUs, this prevents the guest\nkernel correctly isolating between tasks. Consider:\n\n 1) vCPU runs on CPU A, running task 1.\n 2) vCPU moves to CPU B, idle gets scheduled on A. Xen skips IBPB.\n 3) On CPU B, guest kernel switches from task 1 to 2, issuing IBPB.\n 4) vCPU moves back to CPU A. Xen skips IBPB again.\n\nNow, task 2 is running on CPU A with task 1\u0027s training still in the BTB."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "Guest processes may leverage information leaks to obtain information\nintended to be private to other entities in a guest."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-28T15:33:44.782Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-479.html"
}
],
"title": "x86: incomplete IBPB for vCPU isolation",
"workarounds": [
{
"lang": "en",
"value": "Using \"spec-ctrl=ibpb-entry=hvm,ibpb-entry=pv\" on the Xen command line\nwill activate the SRSO mitigation on non-SRSO-vulnerable hardware, but\nit is a large overhead."
}
]
}
},
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"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-23553",
"datePublished": "2026-01-28T15:33:44.782Z",
"dateReserved": "2026-01-14T13:07:36.961Z",
"dateUpdated": "2026-01-28T16:41:14.803Z",
"state": "PUBLISHED"
},
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}
CVE-2025-58150 (GCVE-0-2025-58150)
Vulnerability from cvelistv5 – Published: 2026-01-28 15:33 – Updated: 2026-01-28 16:46
VLAI
Title
x86: buffer overrun with shadow paging + tracing
Summary
Shadow mode tracing code uses a set of per-CPU variables to avoid
cumbersome parameter passing. Some of these variables are written to
with guest controlled data, of guest controllable size. That size can
be larger than the variable, and bounding of the writes was missing.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
Date Public
2026-01-27 12:00
Credits
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],
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"dateUpdated": "2026-01-28T16:46:04.355Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
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"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
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"status": "unknown",
"version": "consult Xen advisory XSA-477"
}
]
}
],
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"lang": "en",
"value": "Only x86 systems are vulnerable. Arm systems are not vulnerable.\n\nOnly HVM guests running in shadow paging mode and with tracing enabled\ncan leverage the vulnerability."
}
],
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{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Jan Beulich of SUSE."
}
],
"datePublic": "2026-01-27T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Shadow mode tracing code uses a set of per-CPU variables to avoid\ncumbersome parameter passing. Some of these variables are written to\nwith guest controlled data, of guest controllable size. That size can\nbe larger than the variable, and bounding of the writes was missing."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "The exact effects depend on what\u0027s adjacent to the variables in\nquestion. The most likely effects are bogus trace data, but none of\nprivilege escalation, information leaks, or Denial of Service (DoS) can\nbe excluded without detailed analysis of the particular build of Xen."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-28T15:33:17.316Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
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}
],
"title": "x86: buffer overrun with shadow paging + tracing",
"workarounds": [
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"lang": "en",
"value": "Running HVM guests in HAP mode only will avoid the vulnerability.\n\nNot enabling tracing will also avoid the vulnerability. Tracing is\nenabled by the \"tbuf_size=\" command line option, or by running tools\nlike xentrace or xenbaked in Dom0. Note that on a running system\nstopping xentrace / xenbaked would disable tracing. For xentrace,\nhowever, this additionally requires that it wasn\u0027t started with the -x\noption. Stopping previously enabled tracing can of course only prevent\nfuture damage; prior damage may have occurred and may manifest only\nlater."
}
]
}
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CVE-2025-58149 (GCVE-0-2025-58149)
Vulnerability from cvelistv5 – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI
Title
Incorrect removal of permissions on PCI device unplug
Summary
When passing through PCI devices, the detach logic in libxl won't remove
access permissions to any 64bit memory BARs the device might have. As a
result a domain can still have access any 64bit memory BAR when such
device is no longer assigned to the domain.
For PV domains the permission leak allows the domain itself to map the memory
in the page-tables. For HVM it would require a compromised device model or
stubdomain to map the leaked memory into the HVM domain p2m.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-672 - Operation on a Resource after Expiration or Release
Assigner
References
Date Public
2025-10-24 12:13
Credits
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"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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}
},
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}
],
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"timestamp": "2025-11-03T14:24:29.854834Z",
"version": "2.0.3"
},
"type": "ssvc"
}
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],
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"description": "CWE-672 Operation on a Resource after Expiration or Release",
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}
]
}
],
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"dateUpdated": "2025-11-03T14:24:43.755Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-11-04T21:13:31.524Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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{
"url": "http://xenbits.xen.org/xsa/advisory-476.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2025/10/24/1"
}
],
"title": "CVE Program Container"
}
],
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"product": "Xen",
"vendor": "Xen",
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"status": "unknown",
"version": "consult Xen advisory XSA-476"
}
]
}
],
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"lang": "en",
"value": "Xen versions 4.0 and newer are vulnerable.\n\nOnly PV guests with PCI passthrough devices can leverage the vulnerability.\n\nOnly domains whose PCI devices are managed by the libxl library are affected.\nThis includes the xl toolstack and xapi, which uses the xl toolstack when\ndealing with PCI devices.\n\nHVM guests are also affected, but accessing the leaked memory requires an\nadditional compromised component on the system."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Jiqian Chen of AMD and diagnosed as a\nsecurity issue by Roger Pau Monn\u00e9 of XenServer."
}
],
"datePublic": "2025-10-24T12:13:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "When passing through PCI devices, the detach logic in libxl won\u0027t remove\naccess permissions to any 64bit memory BARs the device might have. As a\nresult a domain can still have access any 64bit memory BAR when such\ndevice is no longer assigned to the domain.\n\nFor PV domains the permission leak allows the domain itself to map the memory\nin the page-tables. For HVM it would require a compromised device model or\nstubdomain to map the leaked memory into the HVM domain p2m."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A buggy or malicious PV guest can access memory of PCI devices no longer\nassigned to it."
}
]
}
],
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"dateUpdated": "2025-10-31T11:50:39.536Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-476.html"
}
],
"title": "Incorrect removal of permissions on PCI device unplug",
"workarounds": [
{
"lang": "en",
"value": "Not doing hot unplug of PCI devices will avoid the vulnerability.\n\nPassing through PCI devices to HVM domains only will also limit the impact, as\nan attacker would require another compromised component to exploit it."
}
]
}
},
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"assignerShortName": "XEN",
"cveId": "CVE-2025-58149",
"datePublished": "2025-10-31T11:50:39.536Z",
"dateReserved": "2025-08-26T06:48:41.443Z",
"dateUpdated": "2025-11-04T21:13:31.524Z",
"state": "PUBLISHED"
},
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"dataVersion": "5.2"
}
CVE-2025-58148 (GCVE-0-2025-58148)
Vulnerability from cvelistv5 – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI
Title
x86: Incorrect input sanitisation in Viridian hypercalls
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in
one of three formats. Xen has boundary checking bugs with all three
formats, which can cause out-of-bounds reads and writes while processing
the inputs.
* CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can
cause vpmask_set() to write out of bounds when converting the bitmap
to Xen's format.
* CVE-2025-58148. Hypercalls using any input format can cause
send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild
vCPU pointer.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Date Public
2025-10-21 11:59
Credits
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"attackVector": "NETWORK",
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"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
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}
],
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"timestamp": "2025-11-03T14:25:18.838278Z",
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"cweId": "CWE-125",
"description": "CWE-125 Out-of-bounds Read",
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]
},
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"type": "CWE"
}
]
}
],
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-11-04T21:13:30.190Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
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{
"url": "http://xenbits.xen.org/xsa/advisory-475.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2025/10/21/1"
}
],
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}
],
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}
]
}
],
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}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Teddy Astie of Vates"
}
],
"datePublic": "2025-10-21T11:59:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nSome Viridian hypercalls can specify a mask of vCPU IDs as an input, in\none of three formats. Xen has boundary checking bugs with all three\nformats, which can cause out-of-bounds reads and writes while processing\nthe inputs.\n\n * CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can\n cause vpmask_set() to write out of bounds when converting the bitmap\n to Xen\u0027s format.\n\n * CVE-2025-58148. Hypercalls using any input format can cause\n send_ipi() to read d-\u003evcpu[] out-of-bounds, and operate on a wild\n vCPU pointer."
}
],
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"descriptions": [
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"lang": "en",
"value": "A buggy or malicious guest can cause Denial of Service (DoS) affecting\nthe entire host, information leaks, or elevation of privilege."
}
]
}
],
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"dateUpdated": "2025-10-31T11:50:28.407Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-475.html"
}
],
"title": "x86: Incorrect input sanitisation in Viridian hypercalls",
"workarounds": [
{
"lang": "en",
"value": "Not enabling Viridian will avoid the issuse."
}
]
}
},
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"assignerShortName": "XEN",
"cveId": "CVE-2025-58148",
"datePublished": "2025-10-31T11:50:28.407Z",
"dateReserved": "2025-08-26T06:48:41.443Z",
"dateUpdated": "2025-11-04T21:13:30.190Z",
"state": "PUBLISHED"
},
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}
CVE-2025-58147 (GCVE-0-2025-58147)
Vulnerability from cvelistv5 – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI
Title
x86: Incorrect input sanitisation in Viridian hypercalls
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in
one of three formats. Xen has boundary checking bugs with all three
formats, which can cause out-of-bounds reads and writes while processing
the inputs.
* CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can
cause vpmask_set() to write out of bounds when converting the bitmap
to Xen's format.
* CVE-2025-58148. Hypercalls using any input format can cause
send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild
vCPU pointer.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Date Public
2025-10-21 11:59
Credits
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
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"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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}
},
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}
],
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-11-04T21:13:28.853Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
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"url": "http://xenbits.xen.org/xsa/advisory-475.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2025/10/21/1"
}
],
"title": "CVE Program Container"
}
],
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{
"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-475"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "Xen versions 4.15 and newer are vulnerable. Versions 4.14 and older are\nnot vulnerable.\n\nOnly x86 HVM guests which have Viridian enabled can leverage the\nvulnerability.\n\nWith the `xl` toolstack, this means any `viridian=` setting in the VM\u0027s\nconfiguration file.\n\nNote - despite:\n\n `viridian=[\"!hcall_remote_tlb_flush\", \"!hcall_ipi\", \"!ex_processor_masks\"]`\n\nbeing documented to turns off the relevant functionality, this\nconfiguration does not block the relevant hypercalls."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Teddy Astie of Vates"
}
],
"datePublic": "2025-10-21T11:59:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nSome Viridian hypercalls can specify a mask of vCPU IDs as an input, in\none of three formats. Xen has boundary checking bugs with all three\nformats, which can cause out-of-bounds reads and writes while processing\nthe inputs.\n\n * CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can\n cause vpmask_set() to write out of bounds when converting the bitmap\n to Xen\u0027s format.\n\n * CVE-2025-58148. Hypercalls using any input format can cause\n send_ipi() to read d-\u003evcpu[] out-of-bounds, and operate on a wild\n vCPU pointer."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A buggy or malicious guest can cause Denial of Service (DoS) affecting\nthe entire host, information leaks, or elevation of privilege."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-31T11:50:28.282Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-475.html"
}
],
"title": "x86: Incorrect input sanitisation in Viridian hypercalls",
"workarounds": [
{
"lang": "en",
"value": "Not enabling Viridian will avoid the issuse."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2025-58147",
"datePublished": "2025-10-31T11:50:28.282Z",
"dateReserved": "2025-08-26T06:48:41.443Z",
"dateUpdated": "2025-11-04T21:13:28.853Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CERTFR-2026-AVI-0721
Vulnerability from certfr_avis - Published: 2026-06-10 - Updated: 2026-06-10
De multiples vulnérabilités ont été découvertes dans Xen. Elles permettent à un attaquant de provoquer une élévation de privilèges, un déni de service à distance et une atteinte à la confidentialité des données.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
References
| Title | Publication Time | Tags | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen toutes versions sans le dernier correctif de s\u00e9curit\u00e9",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-42489",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42489"
},
{
"name": "CVE-2026-42487",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42487"
},
{
"name": "CVE-2025-10263",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-10263"
},
{
"name": "CVE-2026-42488",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42488"
},
{
"name": "CVE-2026-42490",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42490"
}
],
"initial_release_date": "2026-06-10T00:00:00",
"last_revision_date": "2026-06-10T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0721",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-06-10T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Xen. Elles permettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges, un d\u00e9ni de service \u00e0 distance et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Xen",
"vendor_advisories": [
{
"published_at": "2026-06-09",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-491",
"url": "https://xenbits.xen.org/xsa/advisory-491.html"
},
{
"published_at": "2026-06-09",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-493",
"url": "https://xenbits.xen.org/xsa/advisory-493.html"
},
{
"published_at": "2026-06-09",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-494",
"url": "https://xenbits.xen.org/xsa/advisory-494.html"
},
{
"published_at": "2026-06-09",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-492",
"url": "https://xenbits.xen.org/xsa/advisory-492.html"
}
]
}
CERTFR-2026-AVI-0579
Vulnerability from certfr_avis - Published: 2026-05-13 - Updated: 2026-05-13
Une vulnérabilité a été découverte dans Xen. Elle permet à un attaquant de provoquer une élévation de privilèges.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| XEN | Xen | Xen versions 4.21.x sans le correctif de sécurité xsa490-4.21.patch | ||
| XEN | Xen | Xen versions 4.17.x sans le correctif de sécurité xsa490-4.17-1.patch ou xsa490-4.17-2.patch | ||
| XEN | Xen | Xen versions 4.18.x sans le correctif de sécurité xsa490-4.21.patch | ||
| XEN | Xen | Xen versions xen-unstable sans le correctif de sécurité xsa490.patch |
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen versions 4.21.x sans le correctif de s\u00e9curit\u00e9 xsa490-4.21.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.17.x sans le correctif de s\u00e9curit\u00e9 xsa490-4.17-1.patch ou xsa490-4.17-2.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.18.x sans le correctif de s\u00e9curit\u00e9 xsa490-4.21.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions xen-unstable sans le correctif de s\u00e9curit\u00e9 xsa490.patch ",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2025-54518",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-54518"
}
],
"initial_release_date": "2026-05-13T00:00:00",
"last_revision_date": "2026-05-13T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0579",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-05-13T00:00:00.000000"
}
],
"risks": [
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Xen. Elle permet \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges.",
"title": "Vuln\u00e9rabilit\u00e9 dans Xen",
"vendor_advisories": [
{
"published_at": "2026-05-12",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-490",
"url": "https://xenbits.xen.org/xsa/advisory-490.html"
}
]
}
CERTFR-2026-AVI-0509
Vulnerability from certfr_avis - Published: 2026-04-29 - Updated: 2026-04-29
De multiples vulnérabilités ont été découvertes dans Xen. Certaines d'entre elles permettent à un attaquant de provoquer une élévation de privilèges, un déni de service à distance et une atteinte à la confidentialité des données.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| XEN | Xen | Xen toutes versions utilisant XAPI sans les derniers correctifs de sécurité | ||
| XEN | Xen | Xen toutes versions incluant le correctif de sécurité XSA-419 sans le correctif xsa483-xapi.patch pour Xen XAPI oxenstored | ||
| XEN | Xen | Xen sur systèmes x86 ou Arm PVH ou HVM avec un noyau linux postérieur à 3.8 sans le correctif de sécurité xsa487-linux.patch | ||
| XEN | Xen | Xen toutes versions incluant le correctif de sécurité XSA-419 sans le correctif xsa483.patch pour Xen 4.18.x | ||
| XEN | Xen | Xen versions postérieures ou égales à 4.2 sans le correctif de sécurité xsa484.patch applicable pour Xen 4.18.x | ||
| XEN | Xen | Xen versions 4.17.x et 4.18.x sans le correctif de sécurité xsa486-4.18.patch | ||
| XEN | Xen | Xen versions postérieures ou égales à 4.2 sans le correctif de sécurité xsa484-4.17.patch applicable pour Xen 4.17.x | ||
| XEN | Xen | Xen avec un noyau linux postérieur à 4.12 sans le correctif de sécurité xsa485-linux.patch | ||
| XEN | Xen | Xen versions 4.19.x sans le correctif de sécurité xsa486.patch | ||
| XEN | Xen | Xen toutes versions incluant le correctif de sécurité XSA-419 sans le correctif xsa483-4.17.patch pour Xen 4.17.x |
References
| Title | Publication Time | Tags | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen toutes versions utilisant XAPI sans les derniers correctifs de s\u00e9curit\u00e9",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen toutes versions incluant le correctif de s\u00e9curit\u00e9 XSA-419 sans le correctif xsa483-xapi.patch pour Xen XAPI oxenstored",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen sur syst\u00e8mes x86 ou Arm PVH ou HVM avec un noyau linux post\u00e9rieur \u00e0 3.8 sans le correctif de s\u00e9curit\u00e9 xsa487-linux.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen toutes versions incluant le correctif de s\u00e9curit\u00e9 XSA-419 sans le correctif xsa483.patch pour Xen 4.18.x",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions post\u00e9rieures ou \u00e9gales \u00e0 4.2 sans le correctif de s\u00e9curit\u00e9 xsa484.patch applicable pour Xen 4.18.x",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.17.x et 4.18.x sans le correctif de s\u00e9curit\u00e9 xsa486-4.18.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions post\u00e9rieures ou \u00e9gales \u00e0 4.2 sans le correctif de s\u00e9curit\u00e9 xsa484-4.17.patch applicable pour Xen 4.17.x",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen avec un noyau linux post\u00e9rieur \u00e0 4.12 sans le correctif de s\u00e9curit\u00e9 xsa485-linux.patch ",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.19.x sans le correctif de s\u00e9curit\u00e9 xsa486.patch ",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen toutes versions incluant le correctif de s\u00e9curit\u00e9 XSA-419 sans le correctif xsa483-4.17.patch pour Xen 4.17.x",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-31787",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-31787"
},
{
"name": "CVE-2026-23559",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23559"
},
{
"name": "CVE-2026-42486",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42486"
},
{
"name": "CVE-2026-23558",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23558"
},
{
"name": "CVE-2026-23556",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23556"
},
{
"name": "CVE-2026-31786",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-31786"
},
{
"name": "CVE-2026-23561",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23561"
},
{
"name": "CVE-2026-23557",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23557"
},
{
"name": "CVE-2026-23560",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23560"
},
{
"name": "CVE-2026-23562",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23562"
}
],
"initial_release_date": "2026-04-29T00:00:00",
"last_revision_date": "2026-04-29T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0509",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-04-29T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Xen. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges, un d\u00e9ni de service \u00e0 distance et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Xen",
"vendor_advisories": [
{
"published_at": "2026-04-28",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-484",
"url": "https://xenbits.xen.org/xsa/advisory-484.html"
},
{
"published_at": "2026-04-28",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-489",
"url": "https://xenbits.xen.org/xsa/advisory-489.html"
},
{
"published_at": "2026-04-28",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-485",
"url": "https://xenbits.xen.org/xsa/advisory-485.html"
},
{
"published_at": "2026-04-28",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-486",
"url": "https://xenbits.xen.org/xsa/advisory-486.html"
},
{
"published_at": "2026-04-28",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-487",
"url": "https://xenbits.xen.org/xsa/advisory-487.html"
},
{
"published_at": "2026-04-28",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-483",
"url": "https://xenbits.xen.org/xsa/advisory-483.html"
}
]
}
CERTFR-2026-AVI-0460
Vulnerability from certfr_avis - Published: 2026-04-20 - Updated: 2026-04-20
Une vulnérabilité a été découverte dans Xen. Elle permet à un attaquant de provoquer une atteinte à la confidentialité des données.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| XEN | Xen | Xen versions 4.19.x et 4.20.x sans le correctif de sécurité xsa488-4.20.patch | ||
| XEN | Xen | Xen versions 4.18.x avec le correctif de sécurité xsa488-4.18.patch | ||
| XEN | Xen | Xen versions xen-unstable et 4.21.x sans le correctif de sécurité xsa488.patch | ||
| XEN | Xen | Xen versions 4.17.x avec le correctif de sécurité xsa488-4.17.patch |
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen versions 4.19.x et 4.20.x sans le correctif de s\u00e9curit\u00e9 xsa488-4.20.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.18.x avec le correctif de s\u00e9curit\u00e9 xsa488-4.18.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions xen-unstable et 4.21.x sans le correctif de s\u00e9curit\u00e9 xsa488.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.17.x avec le correctif de s\u00e9curit\u00e9 xsa488-4.17.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2025-54505",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-54505"
}
],
"initial_release_date": "2026-04-20T00:00:00",
"last_revision_date": "2026-04-20T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0460",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-04-20T00:00:00.000000"
}
],
"risks": [
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
}
],
"summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Xen. Elle permet \u00e0 un attaquant de provoquer une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
"title": "Vuln\u00e9rabilit\u00e9 dans Xen",
"vendor_advisories": [
{
"published_at": "2026-04-17",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-488",
"url": "https://xenbits.xen.org/xsa/advisory-488.html"
}
]
}
CERTFR-2026-AVI-0347
Vulnerability from certfr_avis - Published: 2026-03-24 - Updated: 2026-03-24
Une vulnérabilité a été découverte dans Xen. Elle permet à un attaquant de provoquer un contournement de la politique de sécurité.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen sur Linux sans les correctifs de s\u00e9curit\u00e9 xsa482-linux-1.patch et xsa482-linux-2.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-31788",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-31788"
}
],
"initial_release_date": "2026-03-24T00:00:00",
"last_revision_date": "2026-03-24T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0347",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-03-24T00:00:00.000000"
}
],
"risks": [
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
}
],
"summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Xen. Elle permet \u00e0 un attaquant de provoquer un contournement de la politique de s\u00e9curit\u00e9.",
"title": "Vuln\u00e9rabilit\u00e9 dans Xen",
"vendor_advisories": [
{
"published_at": "2026-03-24",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-482",
"url": "https://xenbits.xen.org/xsa/advisory-482.html"
}
]
}
CERTFR-2026-AVI-0304
Vulnerability from certfr_avis - Published: 2026-03-17 - Updated: 2026-03-17
De multiples vulnérabilités ont été découvertes dans Xen. Elles permettent à un attaquant de provoquer une élévation de privilèges, un déni de service à distance et une atteinte à la confidentialité des données.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
References
| Title | Publication Time | Tags | ||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen versions 4.17.x sans le correctif de s\u00e9curit\u00e9 xsa480.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.18.x sans le correctif de s\u00e9curit\u00e9 xsa481.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-23554",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23554"
},
{
"name": "CVE-2026-23555",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23555"
}
],
"initial_release_date": "2026-03-17T00:00:00",
"last_revision_date": "2026-03-17T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0304",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-03-17T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Xen. Elles permettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges, un d\u00e9ni de service \u00e0 distance et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Xen",
"vendor_advisories": [
{
"published_at": "2026-03-17",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-480",
"url": "https://xenbits.xen.org/xsa/advisory-480.html"
},
{
"published_at": "2026-03-17",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-481",
"url": "https://xenbits.xen.org/xsa/advisory-481.html"
}
]
}
CERTFR-2026-AVI-0091
Vulnerability from certfr_avis - Published: 2026-01-27 - Updated: 2026-01-27
De multiples vulnérabilités ont été découvertes dans Xen. Certaines d'entre elles permettent à un attaquant de provoquer une élévation de privilèges, un déni de service à distance et une atteinte à la confidentialité des données.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| XEN | Xen | Xen versions xen-unstable sans les correctifs de sécurité xsa477.patch et xsa479.patch | ||
| XEN | Xen | Xen versions 4.18.x sans les correctifs de sécurité xsa477-4.18.patch et xsa479.patch | ||
| XEN | Xen | Xen versions 4.19.x sans le correctif de securité xsa477.patch | ||
| XEN | Xen | Xen version varstored master sans le correctif de sécurité xsa478.patch |
References
| Title | Publication Time | Tags | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen versions xen-unstable sans les correctifs de s\u00e9curit\u00e9 xsa477.patch et xsa479.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.18.x sans les correctifs de s\u00e9curit\u00e9 xsa477-4.18.patch et xsa479.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.19.x sans le correctif de securit\u00e9 xsa477.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen version varstored master sans le correctif de s\u00e9curit\u00e9 xsa478.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-23553",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23553"
},
{
"name": "CVE-2025-58151",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-58151"
},
{
"name": "CVE-2025-58150",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-58150"
}
],
"initial_release_date": "2026-01-27T00:00:00",
"last_revision_date": "2026-01-27T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0091",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-01-27T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Xen. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges, un d\u00e9ni de service \u00e0 distance et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Xen",
"vendor_advisories": [
{
"published_at": "2026-01-27",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-477",
"url": "https://xenbits.xen.org/xsa/advisory-477.html"
},
{
"published_at": "2026-01-27",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-478",
"url": "https://xenbits.xen.org/xsa/advisory-478.html"
},
{
"published_at": "2026-01-27",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-479",
"url": "https://xenbits.xen.org/xsa/advisory-479.html"
}
]
}
CERTFR-2025-AVI-0927
Vulnerability from certfr_avis - Published: 2025-10-27 - Updated: 2025-10-27
Une vulnérabilité a été découverte dans Xen. Elle permet à un attaquant de provoquer une atteinte à la confidentialité des données et un contournement de la politique de sécurité.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen versions xen-unstable sans le correctif de s\u00e9curit\u00e9 xsa476.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.x ant\u00e9rieures \u00e0 4.17 avec le correctif de s\u00e9curit\u00e9 xsa476-4.17.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.18.x \u00e0 4.20.x sans le correctif de s\u00e9curit\u00e9 xsa476-4.20.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2025-58149",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-58149"
}
],
"initial_release_date": "2025-10-27T00:00:00",
"last_revision_date": "2025-10-27T00:00:00",
"links": [],
"reference": "CERTFR-2025-AVI-0927",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2025-10-27T00:00:00.000000"
}
],
"risks": [
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
}
],
"summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Xen. Elle permet \u00e0 un attaquant de provoquer une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es et un contournement de la politique de s\u00e9curit\u00e9.",
"title": "Vuln\u00e9rabilit\u00e9 dans Xen",
"vendor_advisories": [
{
"published_at": "2025-10-24",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-476",
"url": "https://xenbits.xen.org/xsa/advisory-476.html"
}
]
}
CVE-2026-23558 (GCVE-0-2026-23558)
Vulnerability from nvd – Published: 2026-05-19 12:49 – Updated: 2026-05-20 03:55
VLAI
Title
grant table v2 race in status page mapping
Summary
The adjustments made for XSA-379 as well as those subsequently becoming
XSA-387 still left a race window, when a HVM or PVH guest does a grant
table version change from v2 to v1 in parallel with mapping the status
page(s) via XENMEM_add_to_physmap. Some of the status pages may then be
freed while mappings of them would still be inserted into the guest's
secondary (P2M) page tables.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Date Public
2026-04-28 12:00
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-05-19T13:06:51.044Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/04/28/13"
},
{
"url": "http://xenbits.xen.org/xsa/advisory-486.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-23558",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-19T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-362",
"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-20T03:55:35.327Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-486"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "All Xen versions from 4.0 onwards are affected. Xen versions 3.4 and\nolder are not affected.\n\nOnly x86 HVM and PVH guests permitted to use grant table version 2\ninterfaces can leverage this vulnerability. x86 PV guests cannot\nleverage this vulnerability. On Arm, grant table v2 use is explicitly\nunsupported."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Claude Opus 4.6 and diagnosed as a security\nissue by Rafal Wojtczuk."
}
],
"datePublic": "2026-04-28T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "The adjustments made for XSA-379 as well as those subsequently becoming\nXSA-387 still left a race window, when a HVM or PVH guest does a grant\ntable version change from v2 to v1 in parallel with mapping the status\npage(s) via XENMEM_add_to_physmap. Some of the status pages may then be\nfreed while mappings of them would still be inserted into the guest\u0027s\nsecondary (P2M) page tables."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "Privilege escalation, information leaks, and Denial of Service (DoS) up\nto affecting the entire host cannot be excluded."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-19T12:49:54.652Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-486.html"
}
],
"title": "grant table v2 race in status page mapping",
"workarounds": [
{
"lang": "en",
"value": "Using the \"gnttab=max-ver:1\" hypervisor command line option will avoid\nthe vulnerability.\n\nUsing the \"max_grant_version=1\" guest configuration option for HVM and PVH\nguests will also avoid the vulnerability."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-23558",
"datePublished": "2026-05-19T12:49:54.652Z",
"dateReserved": "2026-01-14T13:07:36.961Z",
"dateUpdated": "2026-05-20T03:55:35.327Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-23557 (GCVE-0-2026-23557)
Vulnerability from nvd – Published: 2026-05-19 12:49 – Updated: 2026-05-19 14:42
VLAI
Title
Xenstored DoS via XS_RESET_WATCHES command
Summary
Any guest can cause xenstored to crash by issuing a XS_RESET_WATCHES
command within a transaction due to an assert() triggering.
In case xenstored was built with NDEBUG #defined nothing bad will
happen, as assert() is doing nothing in this case. Note that the
default is not to define NDEBUG for xenstored builds even in release
builds of Xen.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-617 - Reachable Assertion
Assigner
References
Date Public
2026-04-28 12:00
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-05-19T13:06:41.611Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/04/28/11"
},
{
"url": "http://xenbits.xen.org/xsa/advisory-484.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-23557",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-19T14:42:12.994792Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-617",
"description": "CWE-617 Reachable Assertion",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-19T14:42:45.464Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-484"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "All Xen systems from Xen 4.2 onwards are vulnerable. Systems up to\nXen 4.1 are not vulnerable.\n\nSystems using the C variant of xenstored or xenstore-stubdom built\nwithout NDEBUG are vulnerable. Systems using the OCaml variant of\nXenstore (oxenstored), or the C variant (xenstored or xenstore-stubdom)\nbuilt with NDEBUG defined are not vulnerable."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Andrii Sultanov of Vates."
}
],
"datePublic": "2026-04-28T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Any guest can cause xenstored to crash by issuing a XS_RESET_WATCHES\ncommand within a transaction due to an assert() triggering.\n\nIn case xenstored was built with NDEBUG #defined nothing bad will\nhappen, as assert() is doing nothing in this case. Note that the\ndefault is not to define NDEBUG for xenstored builds even in release\nbuilds of Xen."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "Any unprivileged domain can cause xenstored to crash, causing a\nDoS (denial of service) for any Xenstore action. This will result\nin an inability to perform further domain administration on the host."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-19T12:49:42.202Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-484.html"
}
],
"title": "Xenstored DoS via XS_RESET_WATCHES command",
"workarounds": [
{
"lang": "en",
"value": "There is no known mitigation available."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-23557",
"datePublished": "2026-05-19T12:49:42.202Z",
"dateReserved": "2026-01-14T13:07:36.961Z",
"dateUpdated": "2026-05-19T14:42:45.464Z",
"state": "PUBLISHED"
},
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CVE-2026-23555 (GCVE-0-2026-23555)
Vulnerability from nvd – Published: 2026-03-23 06:57 – Updated: 2026-03-23 14:14
VLAI
Title
Xenstored DoS by unprivileged domain
Summary
Any guest issuing a Xenstore command accessing a node using the
(illegal) node path "/local/domain/", will crash xenstored due to a
clobbered error indicator in xenstored when verifying the node path.
Note that the crash is forced via a failing assert() statement in
xenstored. In case xenstored is being built with NDEBUG #defined,
an unprivileged guest trying to access the node path "/local/domain/"
will result in it no longer being serviced by xenstored, other guests
(including dom0) will still be serviced, but xenstored will use up
all cpu time it can get.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-617 - Reachable Assertion
Assigner
References
Date Public
2026-03-17 12:00
Credits
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}
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CVE-2026-23554 (GCVE-0-2026-23554)
Vulnerability from nvd – Published: 2026-03-23 06:56 – Updated: 2026-03-23 14:19
VLAI
Title
Use after free of paging structures in EPT
Summary
The Intel EPT paging code uses an optimization to defer flushing of any cached
EPT state until the p2m lock is dropped, so that multiple modifications done
under the same locked region only issue a single flush.
Freeing of paging structures however is not deferred until the flushing is
done, and can result in freed pages transiently being present in cached state.
Such stale entries can point to memory ranges not owned by the guest, thus
allowing access to unintended memory regions.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
Date Public
2026-03-17 12:00
Credits
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CVE-2026-23553 (GCVE-0-2026-23553)
Vulnerability from nvd – Published: 2026-01-28 15:33 – Updated: 2026-01-28 16:41
VLAI
Title
x86: incomplete IBPB for vCPU isolation
Summary
In the context switch logic Xen attempts to skip an IBPB in the case of
a vCPU returning to a CPU on which it was the previous vCPU to run.
While safe for Xen's isolation between vCPUs, this prevents the guest
kernel correctly isolating between tasks. Consider:
1) vCPU runs on CPU A, running task 1.
2) vCPU moves to CPU B, idle gets scheduled on A. Xen skips IBPB.
3) On CPU B, guest kernel switches from task 1 to 2, issuing IBPB.
4) vCPU moves back to CPU A. Xen skips IBPB again.
Now, task 2 is running on CPU A with task 1's training still in the BTB.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Date Public
2026-01-27 12:00
Credits
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}
],
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"lang": "en",
"value": "Guest processes may leverage information leaks to obtain information\nintended to be private to other entities in a guest."
}
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CVE-2025-58150 (GCVE-0-2025-58150)
Vulnerability from nvd – Published: 2026-01-28 15:33 – Updated: 2026-01-28 16:46
VLAI
Title
x86: buffer overrun with shadow paging + tracing
Summary
Shadow mode tracing code uses a set of per-CPU variables to avoid
cumbersome parameter passing. Some of these variables are written to
with guest controlled data, of guest controllable size. That size can
be larger than the variable, and bounding of the writes was missing.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
Date Public
2026-01-27 12:00
Credits
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}
]
}
],
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"lang": "en",
"value": "Running HVM guests in HAP mode only will avoid the vulnerability.\n\nNot enabling tracing will also avoid the vulnerability. Tracing is\nenabled by the \"tbuf_size=\" command line option, or by running tools\nlike xentrace or xenbaked in Dom0. Note that on a running system\nstopping xentrace / xenbaked would disable tracing. For xentrace,\nhowever, this additionally requires that it wasn\u0027t started with the -x\noption. Stopping previously enabled tracing can of course only prevent\nfuture damage; prior damage may have occurred and may manifest only\nlater."
}
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CVE-2025-58149 (GCVE-0-2025-58149)
Vulnerability from nvd – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI
Title
Incorrect removal of permissions on PCI device unplug
Summary
When passing through PCI devices, the detach logic in libxl won't remove
access permissions to any 64bit memory BARs the device might have. As a
result a domain can still have access any 64bit memory BAR when such
device is no longer assigned to the domain.
For PV domains the permission leak allows the domain itself to map the memory
in the page-tables. For HVM it would require a compromised device model or
stubdomain to map the leaked memory into the HVM domain p2m.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-672 - Operation on a Resource after Expiration or Release
Assigner
References
Date Public
2025-10-24 12:13
Credits
{
"containers": {
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
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"baseScore": 7.5,
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"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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}
},
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"cweId": "CWE-672",
"description": "CWE-672 Operation on a Resource after Expiration or Release",
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"type": "CWE"
}
]
}
],
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"dateUpdated": "2025-11-03T14:24:43.755Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-11-04T21:13:31.524Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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},
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"url": "http://www.openwall.com/lists/oss-security/2025/10/24/1"
}
],
"title": "CVE Program Container"
}
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{
"defaultStatus": "unknown",
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"version": "consult Xen advisory XSA-476"
}
]
}
],
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{
"lang": "en",
"value": "Xen versions 4.0 and newer are vulnerable.\n\nOnly PV guests with PCI passthrough devices can leverage the vulnerability.\n\nOnly domains whose PCI devices are managed by the libxl library are affected.\nThis includes the xl toolstack and xapi, which uses the xl toolstack when\ndealing with PCI devices.\n\nHVM guests are also affected, but accessing the leaked memory requires an\nadditional compromised component on the system."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Jiqian Chen of AMD and diagnosed as a\nsecurity issue by Roger Pau Monn\u00e9 of XenServer."
}
],
"datePublic": "2025-10-24T12:13:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "When passing through PCI devices, the detach logic in libxl won\u0027t remove\naccess permissions to any 64bit memory BARs the device might have. As a\nresult a domain can still have access any 64bit memory BAR when such\ndevice is no longer assigned to the domain.\n\nFor PV domains the permission leak allows the domain itself to map the memory\nin the page-tables. For HVM it would require a compromised device model or\nstubdomain to map the leaked memory into the HVM domain p2m."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A buggy or malicious PV guest can access memory of PCI devices no longer\nassigned to it."
}
]
}
],
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"dateUpdated": "2025-10-31T11:50:39.536Z",
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}
],
"title": "Incorrect removal of permissions on PCI device unplug",
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{
"lang": "en",
"value": "Not doing hot unplug of PCI devices will avoid the vulnerability.\n\nPassing through PCI devices to HVM domains only will also limit the impact, as\nan attacker would require another compromised component to exploit it."
}
]
}
},
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CVE-2025-58148 (GCVE-0-2025-58148)
Vulnerability from nvd – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI
Title
x86: Incorrect input sanitisation in Viridian hypercalls
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in
one of three formats. Xen has boundary checking bugs with all three
formats, which can cause out-of-bounds reads and writes while processing
the inputs.
* CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can
cause vpmask_set() to write out of bounds when converting the bitmap
to Xen's format.
* CVE-2025-58148. Hypercalls using any input format can cause
send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild
vCPU pointer.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Date Public
2025-10-21 11:59
Credits
{
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"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
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"timestamp": "2025-11-03T14:25:18.838278Z",
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{
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"cweId": "CWE-125",
"description": "CWE-125 Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787 Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-11-03T14:25:21.434Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-11-04T21:13:30.190Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
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{
"url": "http://xenbits.xen.org/xsa/advisory-475.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2025/10/21/1"
}
],
"title": "CVE Program Container"
}
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{
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}
]
}
],
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}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Teddy Astie of Vates"
}
],
"datePublic": "2025-10-21T11:59:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nSome Viridian hypercalls can specify a mask of vCPU IDs as an input, in\none of three formats. Xen has boundary checking bugs with all three\nformats, which can cause out-of-bounds reads and writes while processing\nthe inputs.\n\n * CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can\n cause vpmask_set() to write out of bounds when converting the bitmap\n to Xen\u0027s format.\n\n * CVE-2025-58148. Hypercalls using any input format can cause\n send_ipi() to read d-\u003evcpu[] out-of-bounds, and operate on a wild\n vCPU pointer."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A buggy or malicious guest can cause Denial of Service (DoS) affecting\nthe entire host, information leaks, or elevation of privilege."
}
]
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"url": "https://xenbits.xenproject.org/xsa/advisory-475.html"
}
],
"title": "x86: Incorrect input sanitisation in Viridian hypercalls",
"workarounds": [
{
"lang": "en",
"value": "Not enabling Viridian will avoid the issuse."
}
]
}
},
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"assignerShortName": "XEN",
"cveId": "CVE-2025-58148",
"datePublished": "2025-10-31T11:50:28.407Z",
"dateReserved": "2025-08-26T06:48:41.443Z",
"dateUpdated": "2025-11-04T21:13:30.190Z",
"state": "PUBLISHED"
},
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CVE-2025-58147 (GCVE-0-2025-58147)
Vulnerability from nvd – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI
Title
x86: Incorrect input sanitisation in Viridian hypercalls
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in
one of three formats. Xen has boundary checking bugs with all three
formats, which can cause out-of-bounds reads and writes while processing
the inputs.
* CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can
cause vpmask_set() to write out of bounds when converting the bitmap
to Xen's format.
* CVE-2025-58148. Hypercalls using any input format can cause
send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild
vCPU pointer.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Date Public
2025-10-21 11:59
Credits
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
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{
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}
],
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"timestamp": "2025-10-31T17:45:24.503747Z",
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]
}
],
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"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-11-04T21:13:28.853Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
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},
{
"url": "http://www.openwall.com/lists/oss-security/2025/10/21/1"
}
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"title": "CVE Program Container"
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}
]
}
],
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}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Teddy Astie of Vates"
}
],
"datePublic": "2025-10-21T11:59:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nSome Viridian hypercalls can specify a mask of vCPU IDs as an input, in\none of three formats. Xen has boundary checking bugs with all three\nformats, which can cause out-of-bounds reads and writes while processing\nthe inputs.\n\n * CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can\n cause vpmask_set() to write out of bounds when converting the bitmap\n to Xen\u0027s format.\n\n * CVE-2025-58148. Hypercalls using any input format can cause\n send_ipi() to read d-\u003evcpu[] out-of-bounds, and operate on a wild\n vCPU pointer."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A buggy or malicious guest can cause Denial of Service (DoS) affecting\nthe entire host, information leaks, or elevation of privilege."
}
]
}
],
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"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
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"url": "https://xenbits.xenproject.org/xsa/advisory-475.html"
}
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{
"lang": "en",
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}
]
}
},
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"assignerShortName": "XEN",
"cveId": "CVE-2025-58147",
"datePublished": "2025-10-31T11:50:28.282Z",
"dateReserved": "2025-08-26T06:48:41.443Z",
"dateUpdated": "2025-11-04T21:13:28.853Z",
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