CVE-2026-98315 ntfs: protect runlist updates with the runlist lock
A race condition in the Linux kernel NTFS driver allows concurrent runlist updates to cause memory corruption or data loss.
- 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-2026-98315?
CVE-2026-98315 is a high-severity vulnerability in Linux, published on 6 Oct 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:
ntfs: protect runlist updates with the runlist lock
ntfs_non_resident_attr_shrink() calls runlist helpers that require the runlist write lock, but did not hold it while freeing clusters and truncating the runlist. Serialize those operations and the resident conversion with the runlist lock.
ntfs_attr_map_cluster() can merge a newly allocated run before updating mapping pairs. If the update fails, free the clusters and restore both the in-memory runlist and on-disk mapping pairs from a saved runlist. Mark the volume in error if either rollback step fails.
Which versions are affected by CVE-2026-98315?
How do I fix CVE-2026-98315?
Apply the vendor's patch.
Is CVE-2026-98315 being exploited?
There is no known exploitation of CVE-2026-98315 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-98315, GHSA-32pv-963j-mqgr, UBUNTU-CVE-2026-98315.