Vulnerability-Lookup

SUSE-SU-2026:2329-1

Vulnerability from csaf_suse - Published: 2026-06-10 07:39 - Updated: 2026-06-10 07:39

Summary

Security update for xen

Severity

Important

Notes

Title of the patch: Security update for xen

Description of the patch: This update for xen fixes the following issues: - CVE-2026-42487: x86 HVM I/O port list traversal (bsc#1266952). - CVE-2026-42488: x86: mismatched mapcache metadata (bsc#1266955). - CVE-2026-42489,CVE-2026-42490: domctl lock open to abuse (bsc#1266953).

Patchnames: SUSE-2026-2329,SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-2329,SUSE-SLE-Product-SLES_SAP-15-SP6-2026-2329

CVE-2026-42487

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Recommended 12 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-devel-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-libs-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-devel-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-libs-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch	—	Vendor Fix

Threats

Impact important

CVE-2026-42488

7.5 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

Recommended 12 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-devel-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-libs-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-devel-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-libs-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch	—	Vendor Fix

Threats

Impact important

CVE-2026-42489

5.3 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H

Affected products

Recommended 12 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-devel-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-libs-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-devel-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-libs-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch	—	Vendor Fix

Threats

Impact moderate

CVE-2026-42490

4.1 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected products

Recommended 12 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-devel-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-libs-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-devel-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-libs-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch	—	Vendor Fix

Threats

Impact moderate

References

19 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-updates/2026…	self
https://bugzilla.suse.com/1266952	self
https://bugzilla.suse.com/1266953	self
https://bugzilla.suse.com/1266955	self
https://www.suse.com/security/cve/CVE-2026-42487/	self
https://www.suse.com/security/cve/CVE-2026-42488/	self
https://www.suse.com/security/cve/CVE-2026-42489/	self
https://www.suse.com/security/cve/CVE-2026-42490/	self
https://www.suse.com/security/cve/CVE-2026-42487	external
https://bugzilla.suse.com/1266952	external
https://www.suse.com/security/cve/CVE-2026-42488	external
https://bugzilla.suse.com/1266955	external
https://www.suse.com/security/cve/CVE-2026-42489	external
https://bugzilla.suse.com/1266953	external
https://www.suse.com/security/cve/CVE-2026-42490	external
https://bugzilla.suse.com/1266953	external

JSON

To clipboard

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            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch"
          ]
        }
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          "category": "impact",
          "date": "2026-06-10T07:39:36Z",
          "details": "important"
        }
      ],
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    },
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          "system_name": "SUSE CVE Page",
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          "category": "general",
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      ],
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          "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64",
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          "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-devel-4.18.5_18-150600.3.50.1.x86_64",
          "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-libs-4.18.5_18-150600.3.50.1.x86_64",
          "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-4.18.5_18-150600.3.50.1.x86_64",
          "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64",
          "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-42489",
          "url": "https://www.suse.com/security/cve/CVE-2026-42489"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1266953 for CVE-2026-42489",
          "url": "https://bugzilla.suse.com/1266953"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-devel-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-libs-4.18.5_18-150600.3.50.1.x86_64",
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            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-libs-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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            "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-devel-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-libs-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64",
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            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-devel-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-libs-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-06-10T07:39:36Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-42489"
    },
    {
      "cve": "CVE-2026-42490",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-42490"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "unknown",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-4.18.5_18-150600.3.50.1.x86_64",
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        ]
      },
      "references": [
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          "category": "external",
          "summary": "CVE-2026-42490",
          "url": "https://www.suse.com/security/cve/CVE-2026-42490"
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          "category": "external",
          "summary": "SUSE Bug 1266953 for CVE-2026-42490",
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          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
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          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.1,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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            "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-devel-4.18.5_18-150600.3.50.1.x86_64",
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            "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server 15 SP6-LTSS:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-devel-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-libs-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-domU-4.18.5_18-150600.3.50.1.x86_64",
            "SUSE Linux Enterprise Server for SAP Applications 15 SP6:xen-tools-xendomains-wait-disk-4.18.5_18-150600.3.50.1.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-06-10T07:39:36Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-42490"
    }
  ]
}

CVE-2026-42487 (GCVE-0-2026-42487)

Vulnerability from cvelistv5 – Published: 2026-06-18 13:46 – Updated: 2026-06-18 15:07

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)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H

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

XEN

References

3 references

URL	Tags
https://xenbits.xenproject.org/xsa/advisory-491.html
http://xenbits.xen.org/xsa/advisory-491.html
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Xen	Xen	Unknown: consult Xen advisory XSA-491

Date Public

2026-06-09 12:00

Credits

This issue was discovered by Jan Beulich of SUSE.

Show details on NVD website

JSON

To clipboard

{
  "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": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-18T14:35:06.701148Z",
                "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": "2026-06-18T14:35:11.262Z",
          "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-2026-42488 (GCVE-0-2026-42488)

Vulnerability from cvelistv5 – Published: 2026-06-18 13:47 – Updated: 2026-06-18 15:07

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)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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

XEN

References

3 references

URL	Tags
https://xenbits.xenproject.org/xsa/advisory-494.html
http://xenbits.xen.org/xsa/advisory-494.html
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Xen	Xen	Unknown: consult Xen advisory XSA-494

Date Public

2026-06-09 12:00

Credits

This issue was discovered by Roger Pau Monné of XenServer.

Show details on NVD website

JSON

To clipboard

{
  "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-2026-42489 (GCVE-0-2026-42489)

Vulnerability from cvelistv5 – Published: 2026-06-18 13:47 – Updated: 2026-06-18 15:04

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)


                        
                          CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-667 - Improper Locking

Assigner

XEN

References

1 reference

URL	Tags
https://xenbits.xenproject.org/xsa/advisory-492.html

Impacted products

1 product

Vendor	Product	Version
Xen	Xen	Unknown: consult Xen advisory XSA-492

Date Public

2026-06-09 12:00

Credits

This issue was discovered by Andrew Cooper of Citrix.

Show details on NVD website

JSON

To clipboard

{
  "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."
        }
      ]
    }
  },
  "cveMetadata": {
    "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-2026-42490 (GCVE-0-2026-42490)

Vulnerability from cvelistv5 – Published: 2026-06-18 13:47 – Updated: 2026-06-18 15:04

Title

domctl lock open to abuse

Summary

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-667 - Improper Locking

Assigner

XEN

References

1 reference

URL	Tags
https://xenbits.xenproject.org/xsa/advisory-492.html

Impacted products

1 product

Vendor	Product	Version
Xen	Xen	Unknown: consult Xen advisory XSA-492

Date Public

2026-06-09 12:00

Credits

This issue was discovered by Andrew Cooper of Citrix.

Show details on NVD website

JSON

To clipboard

{
  "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": [
        {
          "lang": "en",
          "value": "There is no known mitigation."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "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"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

SUSE-SU-2026:2329-1

CVE-2026-42487 (GCVE-0-2026-42487)

CVE-2026-42488 (GCVE-0-2026-42488)

CVE-2026-42489 (GCVE-0-2026-42489)

CVE-2026-42490 (GCVE-0-2026-42490)

Tags

Sightings

Nomenclature