CVE-2026-90231
CVE CVE-2026-90231EUVD EUVD-2026-81824Published 2026-09-17T16:07:38.000ZLast changed 2026-09-18T17:53:59.000ZCVSS 8.4
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 2d9da9b188b8cd3b579d7ef5ba5d334be9dd38fc <7da0bdf0610f6d35bbb061536a47fc41646306f0; 2d9da9b188b8cd3b579d7ef5ba5d334be9dd38fc <08c2f7c8d4b1434cfae006f3daf4d1bce330b57b; patch: 0; patch: 6.18.52; patch: 7.2.6; patch: 7.3-rc1; 2d9da9b188b8cd3b579d7ef5ba5d334be9dd38fc <7d1099b86356df81c379159bfb8a598aaf83ce81; 6.7
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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