MediumFix available
xen — security advisory
When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which were assigned to guests, and the associated removal of tracking structures for IRQs used by the devices occurs relatively early in the process. Unfortunately after that point the guest about to be terminated could cause its device model (DM) to re-establish such tracking structures, by having it bind one or more IRQs anew. While some of those tracking structures would still be cleaned up later on, at least one would not be.
- Products
- xen
- Affected versions
- 4.17.1+2-gb773c48e36-1, 4.17.2+55-g0b56bed864-1, 4.17.2+76-ge1f9cb16e2-1, 4.17.2+76-ge1f9cb16e2-1~deb12u1, 4.17.2-1, 4.17.3+10-g091466ba55-1, 4.17.3+10-g091466ba55-1.1, 4.17.3+10-g091466ba55-1.1~exp1, 4.17.3+10-g091466ba55-1.1~exp2, 4.17.3+10-g091466ba55-1~deb12u1, 4.17.3+36-g54dacb5c02-1, 4.17.5+23-ga4e5191dc0-1, 4.17.5+23-ga4e5191dc0-1+deb12u1, 4.17.5+72-g01140da4e8-1, 4.17.7-0+deb12u1, 4.19.0+14-g0918434e0f-1~exp1, 4.19.1-1, 4.19.1-1~exp1, 4.19.1-1~exp4, 4.20.0+68-g35cb38b222-1, 4.20.0-1, 4.20.0~rc2+1-gfcde5e0de8-1~exp1, 4.20.2+37-g61ff35323e-0+deb13u1, 4.20.2+37-g61ff35323e-1, 4.20.2+7-g1badcf5035-0+deb13u1, 4.20.2+7-g1badcf5035-1, 4.20.2+7-g1badcf5035-2, 4.20.3+127-gc42374a105-0+deb13u1, 4.20.3+127-gc42374a105-1, 4.20.4+39-gf1e1321c87-1
- Fixed versions
- 4.20.4+39-gf1e1321c87-0+deb13u1, 4.20.4+39-gf1e1321c87-1
- CVEs
- CVE-2026-62437
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 16:37 UTC · Revision 1
Source evidence
When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which were assigned to guests, and the associated removal of tracking structures for IRQs used by the devices occurs relatively early in the process. Unfortunately after that point the guest about to be terminated could cause its device model (DM) to re-establish such tracking structures, by having it bind one or more IRQs anew. While some of those tracking structures would still be cleaned up later on, at least one would not be.
osv:DEBIAN-CVE-2026-62437
xen
Fixed versions: Not specified
xen
Fixed versions: 4.20.4+39-gf1e1321c87-0+deb13u1
xen
Fixed versions: 4.20.4+39-gf1e1321c87-1
Complete source record
{
"id": "72c7efa1d5eb9b0cd0fcffc291395d9cf1f8cca5b70a47c966cd59a30c7701a3",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-62437",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-62437",
"summary": "When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which were assigned to guests, and the associated removal of tracking structures for IRQs used by the devices occurs relatively early in the process. Unfortunately after that point the guest about to be terminated could cause its device model (DM) to re-establish such tracking structures, by having it bind one or more IRQs anew. While some of those tracking structures would still be cleaned up later on, at least one would not be.",
"evidence": "osv:DEBIAN-CVE-2026-62437",
"products": [
{
"name": {
"value": "xen",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.17.1+2-gb773c48e36-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.2+55-g0b56bed864-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.2+76-ge1f9cb16e2-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.2+76-ge1f9cb16e2-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.3+10-g091466ba55-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.3+10-g091466ba55-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.3+10-g091466ba55-1.1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.3+10-g091466ba55-1.1~exp2",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.3+10-g091466ba55-1~deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.3+36-g54dacb5c02-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.5+23-ga4e5191dc0-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.5+23-ga4e5191dc0-1+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.5+72-g01140da4e8-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.17.7-0+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "4.19.0+14-g0918434e0f-1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "4.19.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.19.1-1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "4.19.1-1~exp4",
"evidence": "/affected/0/versions"
},
{
"value": "4.20.0+68-g35cb38b222-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.20.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.20.0~rc2+1-gfcde5e0de8-1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "4.20.2+37-g61ff35323e-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.20.2+7-g1badcf5035-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.20.2+7-g1badcf5035-2",
"evidence": "/affected/0/versions"
},
{
"value": "4.20.3+127-gc42374a105-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.20.4+39-gf1e1321c87-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "xen",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.20.4+39-gf1e1321c87-0+deb13u1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "4.20.0+68-g35cb38b222-1",
"evidence": "/affected/1/versions"
},
{
"value": "4.20.2+37-g61ff35323e-0+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "4.20.2+37-g61ff35323e-1",
"evidence": "/affected/1/versions"
},
{
"value": "4.20.2+7-g1badcf5035-0+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "4.20.2+7-g1badcf5035-1",
"evidence": "/affected/1/versions"
},
{
"value": "4.20.2+7-g1badcf5035-2",
"evidence": "/affected/1/versions"
},
{
"value": "4.20.3+127-gc42374a105-0+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "4.20.3+127-gc42374a105-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "xen",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.20.4+39-gf1e1321c87-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "4.20.0+68-g35cb38b222-1",
"evidence": "/affected/2/versions"
},
{
"value": "4.20.2+37-g61ff35323e-1",
"evidence": "/affected/2/versions"
},
{
"value": "4.20.2+7-g1badcf5035-1",
"evidence": "/affected/2/versions"
},
{
"value": "4.20.2+7-g1badcf5035-2",
"evidence": "/affected/2/versions"
},
{
"value": "4.20.3+127-gc42374a105-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-62437",
"aliases": [
"DEBIAN-CVE-2026-62437"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:deb/debian/xen?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"4.17.1+2-gb773c48e36-1",
"4.17.2+55-g0b56bed864-1",
"4.17.2+76-ge1f9cb16e2-1",
"4.17.2+76-ge1f9cb16e2-1~deb12u1",
"4.17.2-1",
"4.17.3+10-g091466ba55-1",
"4.17.3+10-g091466ba55-1.1",
"4.17.3+10-g091466ba55-1.1~exp1",
"4.17.3+10-g091466ba55-1.1~exp2",
"4.17.3+10-g091466ba55-1~deb12u1",
"4.17.3+36-g54dacb5c02-1",
"4.17.5+23-ga4e5191dc0-1",
"4.17.5+23-ga4e5191dc0-1+deb12u1",
"4.17.5+72-g01140da4e8-1",
"4.17.7-0+deb12u1",
"4.19.0+14-g0918434e0f-1~exp1",
"4.19.1-1",
"4.19.1-1~exp1",
"4.19.1-1~exp4",
"4.20.0+68-g35cb38b222-1",
"4.20.0-1",
"4.20.0~rc2+1-gfcde5e0de8-1~exp1",
"4.20.2+37-g61ff35323e-1",
"4.20.2+7-g1badcf5035-1",
"4.20.2+7-g1badcf5035-2",
"4.20.3+127-gc42374a105-1",
"4.20.4+39-gf1e1321c87-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-62437.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.20.4+39-gf1e1321c87-0+deb13u1"
}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:deb/debian/xen?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"4.20.0+68-g35cb38b222-1",
"4.20.2+37-g61ff35323e-0+deb13u1",
"4.20.2+37-g61ff35323e-1",
"4.20.2+7-g1badcf5035-0+deb13u1",
"4.20.2+7-g1badcf5035-1",
"4.20.2+7-g1badcf5035-2",
"4.20.3+127-gc42374a105-0+deb13u1",
"4.20.3+127-gc42374a105-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-62437.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.20.4+39-gf1e1321c87-1"
}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:deb/debian/xen?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"4.20.0+68-g35cb38b222-1",
"4.20.2+37-g61ff35323e-1",
"4.20.2+7-g1badcf5035-1",
"4.20.2+7-g1badcf5035-2",
"4.20.3+127-gc42374a105-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-62437.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-21T23:00:08.762748164Z",
"provider": "osv",
"upstream": [
"CVE-2026-62437"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-62437"
]
},
"related_cves": [
{
"value": "CVE-2026-62437",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 401013,
"published_at": "2026-09-08T13:17:19.623+00:00"
}