CVE-2026-72355 netfs: Fix barriering when walking subrequest list
A race condition in the Linux kernel netfs subsystem allows seeing newly added subrequests, potentially causing undefined behavior during retry operations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72355?
CVE-2026-72355 is a critical vulnerability in Linux, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
netfs: Fix barriering when walking subrequest list
Fix the barriering used when walking the subrequest list in retry as there's a possibility of seeing a subreq that's just been added by the application thread.
Which versions are affected by CVE-2026-72355?
How do I fix CVE-2026-72355?
Apply the vendor's patch.
Is CVE-2026-72355 being exploited?
There is no known exploitation of CVE-2026-72355 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72355, DEBIAN-CVE-2026-72355, GHSA-wvjx-p3c2-7wqp, UBUNTU-CVE-2026-72355.