apparmor: fix unconfined user namespace restriction forced stack
In the Linux kernel, the following vulnerability has been resolved: apparmor: fix unconfined user namespace restriction forced stack If a task is already confined by a stack the unprivileged transition restriction on unconfined is not correctly, applied. This results in an escape if two transitions through an unconfined profile can be executed. Fix this by pushing the check into the per profile label build. The check will always be done against unconfined and result in a stack of just the unconfined component when necessary.
CVE-2026-90231
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: cve:CVE-2026-90231
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2d9da9b188b8cd3b579d7ef5ba5d334be9dd38fc",
"lessThan": "fdd341654471cae4fbd9635d32b848cd0c8bc437",
"versionType": "git"
},
{
"status": "affected",
"version": "2d9da9b188b8cd3b579d7ef5ba5d334be9dd38fc",
"lessThan": "7d1099b86356df81c379159bfb8a598aaf83ce81",
"versionType": "git"
},
{
"status": "affected",
"version": "2d9da9b188b8cd3b579d7ef5ba5d334be9dd38fc",
"lessThan": "7da0bdf0610f6d35bbb061536a47fc41646306f0",
"versionType": "git"
},
{
"status": "affected",
"version": "2d9da9b188b8cd3b579d7ef5ba5d334be9dd38fc",
"lessThan": "08c2f7c8d4b1434cfae006f3daf4d1bce330b57b",
"versionType": "git"
}
],
"programFiles": [
"security/apparmor/domain.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"security/apparmor/domain.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90231
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #48639 · Revision 1
- Added to Heist Feed
- Publisher date