Race condition in Linux kernel - CVE-2026-93285

Vulnerability details

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a race condition in the f2fs garbage-collection thread lifetime management when processing sysfs updates concurrently with filesystem remount or shutdown operations. A local user can update sysfs attributes while the garbage-collection thread is being stopped to cause a denial of service.

Exploitation requires write access to the relevant f2fs sysfs attributes.

Affected software

How to mitigate CVE-2026-93285

External References

• https://git.kernel.org/stable/c/23eee01c732ec8c62b05416a05f0f88129df2960
• https://git.kernel.org/stable/c/3d7bca9d583793bb7d0bac0d95a24ddd2e129eed
• https://git.kernel.org/stable/c/7ee6be9ee7f9a803e0f539af26ab1154fdde48ba
• https://git.kernel.org/stable/c/99d14d61aa8beb6cb9a984b9fcddd45e35b24494

Related Security Bulletins

• Race condition in Linux kernel f2fs
• Debian update for linux