CVE-2026-62429 (GCVE-0-2026-62429)
Vulnerability from cvelistv5 – Published: 2026-07-28 12:32 – Updated: 2026-07-28 16:33
VLAI
EPSS
VEX
Title
vNUMA domain cleanup may race other operations
Summary
Accessing the vNUMA configuration data of a guest is still possible when
domain destruction has already started. The cleaning up of that
configuration information is not synchronized with its retrieval by a
device model controlling the guest.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 14:56 UTC
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Date Public
2026-07-28 12:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-07-28T16:33:29.286Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://xenbits.xen.org/xsa/advisory-502.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/07/28/18"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-62429",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-28T14:56:13.716116Z",
"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": "2026-07-28T15:51:45.362Z",
"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-502"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "All Xen versions from 4.5 onwards are vulnerable. Xen versions 4.4 and\nearlier are not vulnerable.\n\nOnly entities controlling guests (on x86: HVM guests) can leverage the\nvulnerability. These are device models running in either a stub domain or\nde-privileged in Dom0.\n\nOnly guests which have vNUMA enabled allow their controlling entities to\nleverage the vulnerability."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Teddy Astie of Vates."
}
],
"datePublic": "2026-07-28T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Accessing the vNUMA configuration data of a guest is still possible when\ndomain destruction has already started. The cleaning up of that\nconfiguration information is not synchronized with its retrieval by a\ndevice model controlling the guest."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "While Denial of Service (DoS) affecting the entire host and information\nleaks and are the prevailing effect, a device model stub domain or a\nde-privileged device model running in the control domain may also be\nable to elevate its privileges to that of the host."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-28T12:32:24.333Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-502.html"
}
],
"title": "vNUMA domain cleanup may race other operations",
"workarounds": [
{
"lang": "en",
"value": "On x86, running only PV or PVH guests will avoid the vulnerability.\n\nNot enabling vNUMA for HVM guests will also avoid the vulnerability."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-62429",
"datePublished": "2026-07-28T12:32:24.333Z",
"dateReserved": "2026-07-14T10:28:12.655Z",
"dateUpdated": "2026-07-28T16:33:29.286Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-62429",
"date": "2026-10-30",
"epss": "0.00224",
"percentile": "0.13076"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-502"
}
]
}
],
"source": "security@xen.org"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Accessing the vNUMA configuration data of a guest is still possible when\ndomain destruction has already started. The cleaning up of that\nconfiguration information is not synchronized with its retrieval by a\ndevice model controlling the guest."
}
],
"id": "CVE-2026-62429",
"lastModified": "2026-07-28T17:16:54.440",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-62429",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-28T14:56:13.716116Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-28T13:19:01.810",
"references": [
{
"source": "security@xen.org",
"url": "https://xenbits.xenproject.org/xsa/advisory-502.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2026/07/28/18"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://xenbits.xen.org/xsa/advisory-502.html"
}
],
"sourceIdentifier": "security@xen.org",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-362"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-07-28T18:11:10+00:00",
"cve": "CVE-2026-62429",
"id": "CVE-2026-62429",
"initial_release_date": "2026-07-28T12:32:24.333000+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "xen: Xen: Race condition in vNUMA domain cleanup may lead to unexpected guest behavior",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62429.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-07-28T16:33:29.286Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://xenbits.xen.org/xsa/advisory-502.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/07/28/18"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-62429",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-28T14:56:13.716116Z",
"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": "2026-07-28T14:55:54.956Z",
"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-502"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "All Xen versions from 4.5 onwards are vulnerable. Xen versions 4.4 and\nearlier are not vulnerable.\n\nOnly entities controlling guests (on x86: HVM guests) can leverage the\nvulnerability. These are device models running in either a stub domain or\nde-privileged in Dom0.\n\nOnly guests which have vNUMA enabled allow their controlling entities to\nleverage the vulnerability."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Teddy Astie of Vates."
}
],
"datePublic": "2026-07-28T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Accessing the vNUMA configuration data of a guest is still possible when\ndomain destruction has already started. The cleaning up of that\nconfiguration information is not synchronized with its retrieval by a\ndevice model controlling the guest."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "While Denial of Service (DoS) affecting the entire host and information\nleaks and are the prevailing effect, a device model stub domain or a\nde-privileged device model running in the control domain may also be\nable to elevate its privileges to that of the host."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-28T12:32:24.333Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-502.html"
}
],
"title": "vNUMA domain cleanup may race other operations",
"workarounds": [
{
"lang": "en",
"value": "On x86, running only PV or PVH guests will avoid the vulnerability.\n\nNot enabling vNUMA for HVM guests will also avoid the vulnerability."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-62429",
"datePublished": "2026-07-28T12:32:24.333Z",
"dateReserved": "2026-07-14T10:28:12.655Z",
"dateUpdated": "2026-07-28T16:33:29.286Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
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.
Loading…
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.