CVE-2026-79602 (GCVE-0-2026-79602)
Vulnerability from cvelistv5
Published
2026-09-08 12:11
Modified
2026-09-10 18:08
Severity ?
VLAI Severity ?
EPSS score ?
Summary
A guest with a PCI device assigned that has at least a BAR on the IO port
space can trigger a BUG() in Xen.
References
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-09-08T17:08:32.715Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://xenbits.xen.org/xsa/advisory-510.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/09/08/7"
}
],
"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-2026-79602",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-10T18:08:16.213605Z",
"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": "2026-09-10T18:08:59.554Z",
"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-510"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "Xen versions 4.6 and later are vulnerable. This is known to be the case\nwith the fix for XSA-491, but it\u0027s possible the issue can also be\ntriggered from other, non-analyzed paths.\n\nOnly x86 systems are vulnerable. Arm systems are not vulnerable.\n\nOnly HVM guests with a PCI device with IO BARs assigned can leverage the\nvulnerability."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Jiqian Chen of AMD and diagnosed as a\nsecurity issue by Roger Pau Monn\u00e9 of AMD."
}
],
"datePublic": "2026-09-08T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A guest with a PCI device assigned that has at least a BAR on the IO port\nspace can trigger a BUG() in Xen."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "Passing through a PCI device with at least one BAR in IO address space to\nunprivileged HVM guests can result in a Denial of Service (DoS) affecting\nthe entire host."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-08T12:11:08.534Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-510.html"
}
],
"title": "x86: improper handling of HVM emulation return codes",
"workarounds": [
{
"lang": "en",
"value": "There is no mitigation available."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-79602",
"datePublished": "2026-09-08T12:11:08.534Z",
"dateReserved": "2026-08-25T07:35:05.289Z",
"dateUpdated": "2026-09-10T18:08:59.554Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"http://xenbits.xen.org/xsa/advisory-510.html\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2026/09/08/7\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2026-09-08T17:08:32.715Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 8.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-79602\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-10T18:08:16.213605Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-119\", \"description\": \"CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-10T18:08:52.303Z\"}}], \"cna\": {\"title\": \"x86: improper handling of HVM emulation return codes\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"This issue was discovered by Jiqian Chen of AMD and diagnosed as a\\nsecurity issue by Roger Pau Monn\\u00e9 of AMD.\"}], \"impacts\": [{\"descriptions\": [{\"lang\": \"en\", \"value\": \"Passing through a PCI device with at least one BAR in IO address space to\\nunprivileged HVM guests can result in a Denial of Service (DoS) affecting\\nthe entire host.\"}]}], \"affected\": [{\"vendor\": \"Xen\", \"product\": \"Xen\", \"versions\": [{\"status\": \"unknown\", \"version\": \"consult Xen advisory XSA-510\"}], \"defaultStatus\": \"unknown\"}], \"datePublic\": \"2026-09-08T12:00:00.000Z\", \"references\": [{\"url\": \"https://xenbits.xenproject.org/xsa/advisory-510.html\"}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"There is no mitigation available.\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A guest with a PCI device assigned that has at least a BAR on the IO port\\nspace can trigger a BUG() in Xen.\"}], \"configurations\": [{\"lang\": \"en\", \"value\": \"Xen versions 4.6 and later are vulnerable. This is known to be the case\\nwith the fix for XSA-491, but it\u0027s possible the issue can also be\\ntriggered from other, non-analyzed paths.\\n\\nOnly x86 systems are vulnerable. Arm systems are not vulnerable.\\n\\nOnly HVM guests with a PCI device with IO BARs assigned can leverage the\\nvulnerability.\"}], \"providerMetadata\": {\"orgId\": \"23aa2041-22e1-471f-9209-9b7396fa234f\", \"shortName\": \"XEN\", \"dateUpdated\": \"2026-09-08T12:11:08.534Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-79602\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-10T18:08:59.554Z\", \"dateReserved\": \"2026-08-25T07:35:05.289Z\", \"assignerOrgId\": \"23aa2041-22e1-471f-9209-9b7396fa234f\", \"datePublished\": \"2026-09-08T12:11:08.534Z\", \"assignerShortName\": \"XEN\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…