CVE-2026-90231
HIGH
8,4
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Attack Vector: local
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: none
Description
AI Translation Available
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.
https://git.kernel.org/stable/c/08c2f7c8d4b1434cfae006f3daf4d1bce330b57b
https://git.kernel.org/stable/c/7d1099b86356df81c379159bfb8a598aaf83ce81
https://git.kernel.org/stable/c/7da0bdf0610f6d35bbb061536a47fc41646306f0