CVE-2026-93810 cachefiles: Fix double fput
A double fput() error in the Linux kernel's cachefiles module can lead to use-after-free conditions, potentially causing crashes or code execution.
- 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-2026-93810?
CVE-2026-93810 is a high-severity use after free vulnerability in Linux, published on 24 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:
cachefiles: Fix double fput
Fix a double fput() in error handling in cachefiles_create_tmpfile().
Which versions are affected by CVE-2026-93810?
How do I fix CVE-2026-93810?
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-2026-93810 being exploited?
There is no known exploitation of CVE-2026-93810 in the wild and no public exploit code.
Sources
Also known as AZL-103703, BELL-CVE-2026-93810, DEBIAN-CVE-2026-93810, GHSA-6jcf-xjrv-rxjr, UBUNTU-CVE-2026-93810.