CVE-2015-8555 (GCVE-0-2015-8555)
Vulnerability from cvelistv5 – Published: 2016-04-13 15:00 – Updated: 2024-08-06 08:20
VLAI
EPSS
VEX
Summary
Xen 4.6.x, 4.5.x, 4.4.x, 4.3.x, and earlier do not initialize x86 FPU stack and XMM registers when XSAVE/XRSTOR are not used to manage guest extended register state, which allows local guest domains to obtain sensitive information from other domains via unspecified vectors.
Severity
8.6 (High)
CWE
- n/a
Assigner
References
7 references
| URL | Tags |
|---|---|
| http://www.oracle.com/technetwork/topics/security… | x_refsource_CONFIRM |
| http://www.debian.org/security/2016/dsa-3519 | vendor-advisoryx_refsource_DEBIAN |
| http://www.securitytracker.com/id/1034477 | vdb-entryx_refsource_SECTRACK |
| http://www.securityfocus.com/bid/79543 | vdb-entryx_refsource_BID |
| http://xenbits.xen.org/xsa/advisory-165.html | x_refsource_CONFIRM |
| https://security.gentoo.org/glsa/201604-03 | vendor-advisoryx_refsource_GENTOO |
| http://support.citrix.com/article/CTX203879 | x_refsource_CONFIRM |
Date Public
2015-12-17 00:00
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"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"cvssMetricV30": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
"version": "3.0"
},
"exploitabilityScore": 3.9,
"impactScore": 4.0,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2016-04-13T15:59:08.290",
"references": [
{
"source": "cve@mitre.org",
"url": "http://support.citrix.com/article/CTX203879"
},
{
"source": "cve@mitre.org",
"url": "http://www.debian.org/security/2016/dsa-3519"
},
{
"source": "cve@mitre.org",
"url": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"
},
{
"source": "cve@mitre.org",
"url": "http://www.securityfocus.com/bid/79543"
},
{
"source": "cve@mitre.org",
"url": "http://www.securitytracker.com/id/1034477"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "http://xenbits.xen.org/xsa/advisory-165.html"
},
{
"source": "cve@mitre.org",
"url": "https://security.gentoo.org/glsa/201604-03"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://support.citrix.com/article/CTX203879"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.debian.org/security/2016/dsa-3519"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/bid/79543"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securitytracker.com/id/1034477"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "http://xenbits.xen.org/xsa/advisory-165.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://security.gentoo.org/glsa/201604-03"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-200"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2025-11-21T12:07:48+00:00",
"cve": "CVE-2015-8555",
"id": "CVE-2015-8555",
"initial_release_date": "2015-12-17T00:00:00+00:00",
"product_status:known_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "xen: information leak in legacy x86 FPU/XMM initialization (XSA-165)",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2015/cve-2015-8555.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-01T02:25:19Z",
"cve": "CVE-2015-8555",
"id": "CVE-2015-8555",
"initial_release_date": "2023-02-15T05:11:45Z",
"product_status:known_affected": "321",
"product_status:known_not_affected": "12",
"product_status:recommended": "536",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2015-8555",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2015-8555.json",
"version": "32"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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