DEBIAN-CVE-2026-23555
Any guest issuing a Xenstore command accessing a node using the (illegal) node path "/local/domain/", will crash xenstored due to a clobbered error indicator in xenstored when verifying the node path. Note that the crash is forced via a failing assert() statement in xenstored. In case xenstored is being built with NDEBUG #defined, an unprivileged guest trying to access the node path "/local/domain/" will result in it no longer being serviced by xenstored, other guests (including dom0) will still be serviced, but xenstored will use up all cpu time it can get.
DEBIAN-CVE-2026-23555
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-23555
xen
Source reference: /affected/0/package/name
- Affected versions
- 4.20.0+68-g35cb38b222-1
Source reference:
/affected/0/versions4.20.2+37-g61ff35323e-0+deb13u1Source reference:
/affected/0/versions4.20.2+37-g61ff35323e-1Source reference:
/affected/0/versions4.20.2+7-g1badcf5035-0+deb13u1Source reference:
/affected/0/versions4.20.2+7-g1badcf5035-1Source reference:
/affected/0/versions4.20.2+7-g1badcf5035-2Source reference:
/affected/0/versions - Fixed versions
- 4.20.3+127-gc42374a105-0+deb13u1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
xen
Source reference: /affected/1/package/name
- Affected versions
- 4.20.0+68-g35cb38b222-1
Source reference:
/affected/1/versions4.20.2+37-g61ff35323e-1Source reference:
/affected/1/versions4.20.2+7-g1badcf5035-1Source reference:
/affected/1/versions4.20.2+7-g1badcf5035-2Source reference:
/affected/1/versions - Fixed versions
- 4.20.3+127-gc42374a105-1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.20.3+127-gc42374a105-0+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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23555.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.20.3+127-gc42374a105-1"
}
]
}
],
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23555.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57427 · Revision 1
- Added to Heist Feed
- Publisher date