ALPINE-CVE-2026-76642
util-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to execute privileged operations on pre-existing filesystems. Attackers can exploit X-mount.idmap or X-mount.owner hooks to clone filesystems with inherited suid bits or modify target inode permissions after a helper fails, achieving privilege escalation.
ALPINE-CVE-2026-76642
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-2026-76642
util-linux
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 2.41.6-r0
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
util-linux
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 2.41.6-r0
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
util-linux
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 2.42.3-r0
Source reference:
/affected/2/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": "2.41.6-r0"
}
]
}
],
"package": {
"name": "util-linux",
"purl": "pkg:apk/alpine/util-linux?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-76642.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.41.6-r0"
}
]
}
],
"package": {
"name": "util-linux",
"purl": "pkg:apk/alpine/util-linux?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-76642.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.42.3-r0"
}
]
}
],
"package": {
"name": "util-linux",
"purl": "pkg:apk/alpine/util-linux?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-76642.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55166 · Revision 1
- Added to Heist Feed
- Publisher date