CVE-2026-74330 configfs: fix lockless traversals of ->s_children
A race condition in the Linux kernel configfs allows attackers to cause a denial of service via lockless traversal issues.
- 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-2026-74330?
CVE-2026-74330 is a high-severity 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:
configfs: fix lockless traversals of ->s_children
Having the parent directory locked protects entries from removal by another thread, but it does *not* protect cursors from being moved around by lseek() - or freed, for that matter.
Which versions are affected by CVE-2026-74330?
How do I fix CVE-2026-74330?
Apply the vendor's patch.
Is CVE-2026-74330 being exploited?
There is no known exploitation of CVE-2026-74330 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74330, DEBIAN-CVE-2026-74330, GHSA-x69c-vj2q-h6ch, UBUNTU-CVE-2026-74330.