CVE-2026-80619 apparmor: fix potential UAF in aa_replace_profiles
A use-after-free vulnerability in the Linux kernel's AppArmor module allows attackers to potentially execute arbitrary code or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80619?
CVE-2026-80619 is a high-severity use after free vulnerability in Linux, published on 28 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
apparmor: fix potential UAF in aa_replace_profiles
The function aa_replace_profiles was accessing udata->size after calling aa_put_loaddata(udata), causing a potential UAF.
Fixed this by saving the size to a local variable before dropping the reference.
Which versions are affected by CVE-2026-80619?
How do I fix CVE-2026-80619?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-80619 being exploited?
There is no known exploitation of CVE-2026-80619 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80619, DEBIAN-CVE-2026-80619, GHSA-m5rp-7qww-6j53, UBUNTU-CVE-2026-80619.