ALPINE-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.
ALPINE-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:ALPINE-CVE-2026-23555
xen
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 4.18.5-r5
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
xen
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 4.19.4-r2
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
xen
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 4.20.2-r2
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
xen
Source reference: /affected/3/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 4.20.2-r2
Source reference:
/affected/3/ranges - Prerequisites
- Not stated in this record
xen
Source reference: /affected/4/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 4.21.0-r3
Source reference:
/affected/4/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": "4.18.0"
},
{
"fixed": "4.18.5-r5"
}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.20"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-23555.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.18.0"
},
{
"fixed": "4.19.4-r2"
}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-23555.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.18.0"
},
{
"fixed": "4.20.2-r2"
}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-23555.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.18.0"
},
{
"fixed": "4.20.2-r2"
}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-23555.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.18.0"
},
{
"fixed": "4.21.0-r3"
}
]
}
],
"package": {
"name": "xen",
"purl": "pkg:apk/alpine/xen?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-23555.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #54179 · Revision 1
- Added to Heist Feed
- Publisher date