CVE-2026-72363 netfs: Fix folio state after ENOMEM whilst under writeback iteration
A local attacker can cause a kernel crash by triggering a memory allocation failure during network filesystem writeback operations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72363?
CVE-2026-72363 is a vulnerability in Linux, published on 15 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:
netfs: Fix folio state after ENOMEM whilst under writeback iteration
Fix the state of the current folio when ENOMEM occurs during writeback iteration. The folio needs to be redirtied and unlocked before the terminal writeback_iter() is invoked.
Which versions are affected by CVE-2026-72363?
How do I fix CVE-2026-72363?
Apply the vendor's patch.
Is CVE-2026-72363 being exploited?
There is no known exploitation of CVE-2026-72363 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72363, DEBIAN-CVE-2026-72363, GHSA-w6m3-rghc-mvf9, UBUNTU-CVE-2026-72363.