CVE-2026-97585 afs: Fix double-unmap of directory block
A double-unmap vulnerability in the Linux kernel AFS filesystem allows local attackers to cause denial of service or potentially execute code.
- 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-2026-97585?
CVE-2026-97585 is a memory corruption vulnerability in Linux, published on 25 Sep 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:
afs: Fix double-unmap of directory block
Fix afs_edit_dir_remove() to use a cleanup function to unmap the block pointed to by afs_dir_iter::block if it's left pointing to something rather than manually kunmapping the blocks. Manually kunmapping without clearing iter.blocks can result in a double-kunmap if afs_dir_find_block() is called twice in a row (which would be the case if the block being modified is not first in the hash chain).
Which versions are affected by CVE-2026-97585?
How do I fix CVE-2026-97585?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-97585 being exploited?
There is no known exploitation of CVE-2026-97585 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-97585, DEBIAN-CVE-2026-97585, GHSA-cgwc-p322-356w, UBUNTU-CVE-2026-97585.