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CERTFR-2026-AVI-1302
Vulnerability from certfr_avis
De multiples vulnérabilités ont été découvertes dans Xen. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire, une élévation de privilèges 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 les derniers correctifs 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-2026-79611",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-79611"
},
{
"name": "CVE-2023-34321",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-34321"
},
{
"name": "CVE-2026-102700",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-102700"
},
{
"name": "CVE-2026-79608",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-79608"
},
{
"name": "CVE-2026-79609",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-79609"
},
{
"name": "CVE-2026-79610",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-79610"
},
{
"name": "CVE-2023-20593",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-20593"
},
{
"name": "CVE-2017-14318",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-14318"
},
{
"name": "CVE-2017-5754",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-5754"
},
{
"name": "CVE-2026-79607",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-79607"
},
{
"name": "CVE-2026-102701",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-102701"
},
{
"name": "CVE-2026-102702",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-102702"
},
{
"name": "CVE-2026-102699",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-102699"
}
],
"initial_release_date": "2026-10-14T00:00:00",
"last_revision_date": "2026-10-14T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-1302",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-10-14T00:00:00.000000"
}
],
"risks": [
{
"description": "Ex\u00e9cution de code arbitraire"
},
{
"description": "D\u00e9ni de service"
},
{
"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 ex\u00e9cution de code arbitraire, une \u00e9l\u00e9vation de privil\u00e8ges et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Xen",
"vendor_advisories": [
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-520",
"url": "https://xenbits.xen.org/xsa/advisory-520.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-515",
"url": "https://xenbits.xen.org/xsa/advisory-515.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-518",
"url": "https://xenbits.xen.org/xsa/advisory-518.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-516",
"url": "https://xenbits.xen.org/xsa/advisory-516.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-514",
"url": "https://xenbits.xen.org/xsa/advisory-514.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-517",
"url": "https://xenbits.xen.org/xsa/advisory-517.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-519",
"url": "https://xenbits.xen.org/xsa/advisory-519.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-521",
"url": "https://xenbits.xen.org/xsa/advisory-521.html"
}
]
}
CVE-2017-14318 (GCVE-0-2017-14318)
Vulnerability from cvelistv5
Published
2017-09-12 15:00
Modified
2024-08-05 19:20
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
An issue was discovered in Xen 4.5.x through 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner's grant table is checked to see if a grant mapping to the calling domain exists for the page in question. However, the function does not check to see if the owning domain actually has a grant table or not. Some special domains, such as `DOMID_XEN`, `DOMID_IO` and `DOMID_COW` are created without grant tables. Hence, if __gnttab_cache_flush operates on a page owned by these special domains, it will attempt to dereference a NULL pointer in the domain struct.
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
{
"containers": {
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},
"references": [
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://support.citrix.com/article/CTX227185"
},
{
"name": "DSA-4050",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN",
"x_transferred"
],
"url": "https://www.debian.org/security/2017/dsa-4050"
},
{
"name": "1039349",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK",
"x_transferred"
],
"url": "http://www.securitytracker.com/id/1039349"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "http://xenbits.xen.org/xsa/advisory-232.html"
},
{
"name": "100817",
"tags": [
"vdb-entry",
"x_refsource_BID",
"x_transferred"
],
"url": "http://www.securityfocus.com/bid/100817"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"datePublic": "2017-09-12T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "An issue was discovered in Xen 4.5.x through 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner\u0027s grant table is checked to see if a grant mapping to the calling domain exists for the page in question. However, the function does not check to see if the owning domain actually has a grant table or not. Some special domains, such as `DOMID_XEN`, `DOMID_IO` and `DOMID_COW` are created without grant tables. Hence, if __gnttab_cache_flush operates on a page owned by these special domains, it will attempt to dereference a NULL pointer in the domain struct."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2017-11-29T10:57:01.000Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://support.citrix.com/article/CTX227185"
},
{
"name": "DSA-4050",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN"
],
"url": "https://www.debian.org/security/2017/dsa-4050"
},
{
"name": "1039349",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK"
],
"url": "http://www.securitytracker.com/id/1039349"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "http://xenbits.xen.org/xsa/advisory-232.html"
},
{
"name": "100817",
"tags": [
"vdb-entry",
"x_refsource_BID"
],
"url": "http://www.securityfocus.com/bid/100817"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "cve@mitre.org",
"ID": "CVE-2017-14318",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "n/a",
"version": {
"version_data": [
{
"version_value": "n/a"
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
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"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "An issue was discovered in Xen 4.5.x through 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner\u0027s grant table is checked to see if a grant mapping to the calling domain exists for the page in question. However, the function does not check to see if the owning domain actually has a grant table or not. Some special domains, such as `DOMID_XEN`, `DOMID_IO` and `DOMID_COW` are created without grant tables. Hence, if __gnttab_cache_flush operates on a page owned by these special domains, it will attempt to dereference a NULL pointer in the domain struct."
}
]
},
"problemtype": {
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"value": "n/a"
}
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}
]
},
"references": {
"reference_data": [
{
"name": "https://support.citrix.com/article/CTX227185",
"refsource": "CONFIRM",
"url": "https://support.citrix.com/article/CTX227185"
},
{
"name": "DSA-4050",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2017/dsa-4050"
},
{
"name": "1039349",
"refsource": "SECTRACK",
"url": "http://www.securitytracker.com/id/1039349"
},
{
"name": "http://xenbits.xen.org/xsa/advisory-232.html",
"refsource": "CONFIRM",
"url": "http://xenbits.xen.org/xsa/advisory-232.html"
},
{
"name": "100817",
"refsource": "BID",
"url": "http://www.securityfocus.com/bid/100817"
}
]
}
}
}
},
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"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2017-14318",
"datePublished": "2017-09-12T15:00:00.000Z",
"dateReserved": "2017-09-12T00:00:00.000Z",
"dateUpdated": "2024-08-05T19:20:41.545Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2023-34321 (GCVE-0-2023-34321)
Vulnerability from cvelistv5
Published
2024-01-05 16:17
Modified
2025-11-04 19:16
Severity ?
VLAI Severity ?
EPSS score ?
Summary
Arm provides multiple helpers to clean & invalidate the cache
for a given region. This is, for instance, used when allocating
guest memory to ensure any writes (such as the ones during scrubbing)
have reached memory before handing over the page to a guest.
Unfortunately, the arithmetics in the helpers can overflow and would
then result to skip the cache cleaning/invalidation. Therefore there
is no guarantee when all the writes will reach the memory.
References
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2025-11-04T19:16:34.429Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://xenbits.xenproject.org/xsa/advisory-437.html"
},
{
"url": "http://xenbits.xen.org/xsa/advisory-437.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 3.3,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2023-34321",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-01-09T15:52:01.673224Z",
"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": "2025-04-17T18:14:15.713Z",
"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-437"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "Systems running all version of Xen are affected.\n\nOnly systems running Xen on Arm 32-bit are vulnerable. Xen on Arm 64-bit\nis not affected.\n"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Julien Grall of Amazon.\n"
}
],
"datePublic": "2023-09-05T07:03:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Arm provides multiple helpers to clean \u0026 invalidate the cache\nfor a given region. This is, for instance, used when allocating\nguest memory to ensure any writes (such as the ones during scrubbing)\nhave reached memory before handing over the page to a guest.\n\nUnfortunately, the arithmetics in the helpers can overflow and would\nthen result to skip the cache cleaning/invalidation. Therefore there\nis no guarantee when all the writes will reach the memory.\n"
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A malicious guest may be able to read sensitive data from memory that\npreviously belonged to another guest.\n"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-01-05T16:17:17.379Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-437.html"
}
],
"title": "arm32: The cache may not be properly cleaned/invalidated",
"workarounds": [
{
"lang": "en",
"value": "There is no known mitigation.\n"
}
]
}
},
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"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
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"datePublished": "2024-01-05T16:17:17.379Z",
"dateReserved": "2023-06-01T10:44:17.065Z",
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CVE-2026-102702 (GCVE-0-2026-102702)
Vulnerability from cvelistv5
Published
2026-10-13 15:45
Modified
2026-10-20 17:28
Severity ?
VLAI Severity ?
EPSS score ?
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
1) XSA-437 (CVE-2023-34321) addressed issues with overflows in
calculations involved in guests flushing caches through
GNTTABOP_cache_flush. Unfortunately the fix there introduced a
calculation which may underflow, resulting in a loop which would - at
least on 64-bit Arm - take excessively long, and which would likely
eventually crash the hypervisor.
This is CVE-2026-102699.
2) GNTTABOP_cache_flush may be issued on memory mapped from another
domain using the grant table interface. However there was no
restriction to disallow the use of invalidate-without-clean against
read-only grant mappings, which may corrupt the granted memory.
This is CVE-2026-102702.
References
{
"containers": {
"adp": [
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"metrics": [
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
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"confidentialityImpact": "NONE",
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"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
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"id": "CVE-2026-102702",
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{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-20T17:27:31.334256Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-191",
"description": "CWE-191 Integer Underflow (Wrap or Wraparound)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-20T17:28:13.480Z",
"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-519"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "All Xen versions from 4.5 onwards are vulnerable. Xen versions 4.4 and\nearlier are not vulnerable.\n\nOnly Arm systems are vulnerable. x86 systems are not vulnerable."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "CVE-2026-102699 was discovered by Leonid Komarianskyi of EPAM. It was\nlater independently reported by Ayan Kumar Halder of AMD.\n\nCVE-2026-102702 was found by the security team while looking at the\nsurrounding code."
}
],
"datePublic": "2026-10-13T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\n1) XSA-437 (CVE-2023-34321) addressed issues with overflows in\n calculations involved in guests flushing caches through\n GNTTABOP_cache_flush. Unfortunately the fix there introduced a\n calculation which may underflow, resulting in a loop which would - at\n least on 64-bit Arm - take excessively long, and which would likely\n eventually crash the hypervisor.\n\n This is CVE-2026-102699.\n\n2) GNTTABOP_cache_flush may be issued on memory mapped from another\n domain using the grant table interface. However there was no\n restriction to disallow the use of invalidate-without-clean against\n read-only grant mappings, which may corrupt the granted memory.\n\n This is CVE-2026-102702."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A malicious unprivileged guest may crash the hypervisor, causing a\nDenial of Service (DoS) affecting the entire host, or corrupt memory\nbelonging to another domain. Privilege escalation and information leaks\ncannot be ruled out."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-13T15:45:13.125Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-519.html"
}
],
"title": "Arm: multiple issues with GNTTABOP_cache_flush",
"workarounds": [
{
"lang": "en",
"value": "There is no known mitigation."
}
]
}
},
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CVE-2026-102699 (GCVE-0-2026-102699)
Vulnerability from cvelistv5
Published
2026-10-13 15:45
Modified
2026-10-20 17:30
Severity ?
VLAI Severity ?
EPSS score ?
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
1) XSA-437 (CVE-2023-34321) addressed issues with overflows in
calculations involved in guests flushing caches through
GNTTABOP_cache_flush. Unfortunately the fix there introduced a
calculation which may underflow, resulting in a loop which would - at
least on 64-bit Arm - take excessively long, and which would likely
eventually crash the hypervisor.
This is CVE-2026-102699.
2) GNTTABOP_cache_flush may be issued on memory mapped from another
domain using the grant table interface. However there was no
restriction to disallow the use of invalidate-without-clean against
read-only grant mappings, which may corrupt the granted memory.
This is CVE-2026-102702.
References
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CVE-2017-5754 (GCVE-0-2017-5754)
Vulnerability from cvelistv5
Published
2018-01-04 13:00
Modified
2026-05-28 17:53
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- Information Disclosure
Summary
Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis of the data cache.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Intel Corporation | Most Modern Operating Systems |
Version: All |
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"name": "USN-3597-2",
"refsource": "UBUNTU",
"url": "https://usn.ubuntu.com/3597-2/"
},
{
"name": "http://nvidia.custhelp.com/app/answers/detail/a_id/4614",
"refsource": "CONFIRM",
"url": "http://nvidia.custhelp.com/app/answers/detail/a_id/4614"
},
{
"name": "SUSE-SU-2018:0010",
"refsource": "SUSE",
"url": "http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html"
},
{
"name": "20180104 CPU Side-Channel Information Disclosure Vulnerabilities",
"refsource": "CISCO",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180104-cpusidechannel"
},
{
"name": "USN-3523-2",
"refsource": "UBUNTU",
"url": "https://usn.ubuntu.com/usn/usn-3523-2/"
},
{
"name": "USN-3516-1",
"refsource": "UBUNTU",
"url": "https://usn.ubuntu.com/usn/usn-3516-1/"
},
{
"name": "USN-3541-2",
"refsource": "UBUNTU",
"url": "https://usn.ubuntu.com/3541-2/"
},
{
"name": "https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html",
"refsource": "MISC",
"url": "https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html"
},
{
"name": "https://support.lenovo.com/us/en/solutions/LEN-18282",
"refsource": "CONFIRM",
"url": "https://support.lenovo.com/us/en/solutions/LEN-18282"
},
{
"name": "https://meltdownattack.com/",
"refsource": "MISC",
"url": "https://meltdownattack.com/"
},
{
"name": "openSUSE-SU-2018:0023",
"refsource": "SUSE",
"url": "http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html"
},
{
"name": "http://nvidia.custhelp.com/app/answers/detail/a_id/4613",
"refsource": "CONFIRM",
"url": "http://nvidia.custhelp.com/app/answers/detail/a_id/4613"
},
{
"name": "USN-3522-4",
"refsource": "UBUNTU",
"url": "https://usn.ubuntu.com/3522-4/"
},
{
"name": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html",
"refsource": "MISC",
"url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html"
},
{
"name": "http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2019-003.txt",
"refsource": "CONFIRM",
"url": "http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2019-003.txt"
},
{
"name": "https://cert-portal.siemens.com/productcert/pdf/ssa-608355.pdf",
"refsource": "CONFIRM",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-608355.pdf"
},
{
"name": "https://www.oracle.com/security-alerts/cpuapr2020.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpuapr2020.html"
},
{
"name": "https://cdrdv2.intel.com/v1/dl/getContent/685358",
"refsource": "CONFIRM",
"url": "https://cdrdv2.intel.com/v1/dl/getContent/685358"
}
]
}
}
}
},
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"assignerShortName": "intel",
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"datePublished": "2018-01-04T13:00:00.000Z",
"dateReserved": "2017-02-01T00:00:00.000Z",
"dateUpdated": "2026-05-28T17:53:08.980Z",
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CVE-2026-102700 (GCVE-0-2026-102700)
Vulnerability from cvelistv5
Published
2026-10-13 15:45
Modified
2026-10-20 17:16
Severity ?
VLAI Severity ?
EPSS score ?
Summary
With its original introduction, GNTTAB_cache_flush was made available
uniformly. XSA-232 (CVE-2017-14318) then covered an omitted NULL
pointer check, yet the addition of that check failed to adjust the
subsequent error path. That error path fails to drop a page reference in
case the specified page is owned by a special system domain (DOM_IO and
DOM_COW are system domains which can have memory pages assigned to them.)
References
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}
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CVE-2026-79607 (GCVE-0-2026-79607)
Vulnerability from cvelistv5
Published
2026-10-13 15:43
Modified
2026-10-16 18:36
Severity ?
VLAI Severity ?
EPSS score ?
Summary
During Xenstore live update the state record for a Xenstore watch with
specified watch depth is written with two bytes missing. This results
in an inconsistent state when reading the state back in the new Xenstore,
causing a crash of Xenstore or wrong Xenstore data.
References
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],
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}
]
}
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CVE-2026-79610 (GCVE-0-2026-79610)
Vulnerability from cvelistv5
Published
2026-10-13 15:44
Modified
2026-10-20 17:33
Severity ?
VLAI Severity ?
EPSS score ?
Summary
XSA-501 was about issues with v1 -> v2 and v2 -> v1 changes racing certain
other grant table operations. Sadly a v2 -> v1 -> v2 change has yet
another effect which wasn't accounted for: During the first change, status
pages would be freed. During the second change they would be allocated
again. Hence across the full pair of change the addresses of the status
pages may change, rendering stale previously calculated pointers into the
status array.
References
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"title": "CVE Program Container"
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"cweId": "CWE-362",
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"type": "CWE"
}
]
}
],
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}
],
"impacts": [
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"descriptions": [
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"lang": "en",
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]
}
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],
"title": "grant-table: double version change race",
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"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 guests will\nalso avoid the vulnerability."
}
]
}
},
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CVE-2026-79611 (GCVE-0-2026-79611)
Vulnerability from cvelistv5
Published
2026-10-13 15:44
Modified
2026-10-20 17:31
Severity ?
VLAI Severity ?
EPSS score ?
Summary
For XSA-308 logic was introduced, as VMX VMEntry checks do not like the
exact combination of state which occurs when #DB in intercepted, Single
Stepping is active, and blocked by STI/MovSS is active, despite this being
a legitimate state to be in. The resulting VMEntry failure is fatal to
the guest.
Sadly there is another special sub-case of the above, with branch tracing
enabled. In that case the prior adjustment would still cause a VMentry
failure, as before fatal to the guest.
References
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}
],
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}
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}
],
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CVE-2023-20593 (GCVE-0-2023-20593)
Vulnerability from cvelistv5
Published
2023-07-24 19:38
Modified
2025-02-13 16:39
Severity ?
VLAI Severity ?
EPSS score ?
Summary
An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information.
References
| URL | Tags | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AMD | Ryzen™ 3000 Series Desktop Processors “Matisse” AM4 |
Version: various |
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
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CVE-2026-79608 (GCVE-0-2026-79608)
Vulnerability from cvelistv5
Published
2026-10-13 15:44
Modified
2026-10-20 17:36
Severity ?
VLAI Severity ?
EPSS score ?
Summary
The workaround for XSA-433 (Zenbleed, CVE-2023-20593) was later
re-worked to better integrate with other manipulations of the same MSR.
In this rework an inverted conditional was introduced, resulting in the
workaround to not be applied when needed and vice versa.
For more details, see:
http://xenbits.xen.org/xsa/advisory-433.html
References
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CVE-2026-79609 (GCVE-0-2026-79609)
Vulnerability from cvelistv5
Published
2026-10-13 15:44
Modified
2026-10-20 17:34
Severity ?
VLAI Severity ?
EPSS score ?
Summary
XPTI (Xen Page Table Isolation) was introduced to mitigate Meltdown
(CVE-2017-5754, one aspect of XSA-254). This involves copying 64-bit PV
guest page table entries from guest-chosen root page tables to the Xen-
chosen one which is in actual use by hardware. To read the guest root
page table, the directmap is used. PV guests, however, have a directmap
which may not cover all memory; in particular this is the case if any
memory extends beyond the 5 TiB (CONFIG_BIGMEM=y: 3.5 TiB) address
boundary.
References
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-10-13T16:13:43.715Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://xenbits.xen.org/xsa/advisory-516.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-79609",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-20T17:34:35.122730Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-284",
"description": "CWE-284 Improper Access Control",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-20T17:34:39.462Z",
"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-516"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "All versions of Xen with the XPTI work backported to are affected. In\nupstream these are Xen 4.7.5 and onwards, Xen 4.8.3 and onwards, Xen 4.9.2\nand onwards, Xen 4.10.1 and onwards, and all major releases from 4.11\nonwards.\n\nOnly 64-bit PV guests can leverage the vulnerability. HVM and PVH guests\ncannot leverage the vulnerability. 32-bit PV guests haven\u0027t been security\nsupported anymore.\n\nOnly x86 systems are affected. Arm systems are not affected.\n\nOnly systems with RAM above the 5 TiB (CONFIG_BIGMEM=y: 3.5 TiB) boundary\nare affected. Systems with no RAM above the 5 TiB (CONFIG_BIGMEM=y: 3.5\nTiB) boundary are not affected."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by George Dunlap."
}
],
"datePublic": "2026-10-13T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "XPTI (Xen Page Table Isolation) was introduced to mitigate Meltdown\n(CVE-2017-5754, one aspect of XSA-254). This involves copying 64-bit PV\nguest page table entries from guest-chosen root page tables to the Xen-\nchosen one which is in actual use by hardware. To read the guest root\npage table, the directmap is used. PV guests, however, have a directmap\nwhich may not cover all memory; in particular this is the case if any\nmemory extends beyond the 5 TiB (CONFIG_BIGMEM=y: 3.5 TiB) address\nboundary."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A 64-bit PV guest may be able to elevate its privilege to that of the\nhost. It is also possible for them to observe information pertaining to\nother guests, or to cause Denial of Service (DoS) affecting the entire\nhost."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-13T15:44:24.763Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-516.html"
}
],
"title": "x86: XPTI may break on huge-memory systems",
"workarounds": [
{
"lang": "en",
"value": "Not running 64-bit PV guests will avoid the vulnerability.\n\nThe \"mem=\" hypervisor command line option may be used to limit the amount\nof memory Xen is going to use. That would be \"mem=5T\" for the\nCONFIG_BIGMEM=n case and \"mem=3584G\" for the CONFIG_BIGMEM=y one."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-79609",
"datePublished": "2026-10-13T15:44:24.763Z",
"dateReserved": "2026-08-25T07:35:05.289Z",
"dateUpdated": "2026-10-20T17:34:39.462Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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