CVE-2026-23268
Description
In the Linux kernel, the following vulnerability has been resolved: apparmor: fix unprivileged local user can do privileged policy management An unprivileged local user can load, replace, and remove profiles by opening the apparmorfs interfaces, via a confused deputy attack, by passing the opened fd to a privileged process, and getting the privileged process to write to the interface. This does require a privileged target that can be manipulated to do the write for the unprivileged process, but once such access is achieved full policy management is possible and all the possible implications that implies: removing confinement, DoS of system or target applications by denying all execution, by-passing the unprivileged user namespace restriction, to exploiting kernel bugs for a local privilege escalation. The policy management interface can not have its permissions simply changed from 0666 to 0600 because non-root processes need to be able to load policy to different policy namespaces. Instead ensure the task writing the interface has privileges that are a subset of the task that opened the interface. This is already done via policy for confined processes, but unconfined can delegate access to the opened fd, by-passing the usual policy check.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 6.1.164-1 |
| debian | bullseye | fixed | 5.10.251-1 |
| debian | forky | fixed | 6.19.6-2 |
| debian | sid | fixed | 6.19.6-2 |
| debian | trixie | fixed | 6.12.74-2 |
| linux-kernel | affected | 5.10.253 | |
| linux-kernel | 7.0 | affected | |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| gcp | | |
References
- https://www.suse.com/security/cve/CVE-2026-23268.html
- https://security-tracker.debian.org/tracker/CVE-2026-23268
- https://git.kernel.org/stable/c/0fc63dd9170643d15c25681fca792539e23f4640
- https://git.kernel.org/stable/c/17debf5586020790b5717f96e5e6a3ca5bb961ab
- https://git.kernel.org/stable/c/33ee909702e047c94aaf41d4eea35626d509802c
- https://git.kernel.org/stable/c/4cafce4d6d0a66ec27e3af5637c11901d60189fa
- https://git.kernel.org/stable/c/6601e13e82841879406bf9f369032656f441a425
- https://git.kernel.org/stable/c/a407a078cd41b5261b99d822af784bd9f136eb4d
- https://git.kernel.org/stable/c/b60b3f7a35c46b2e0ca934f9c988b8fca06d76c6
- https://git.kernel.org/stable/c/b6a94eeca9c6c8f7c55ad44c62c98324f51ec596
- https://www.qualys.com/2026/03/10/crack-armor.txt
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.