CVE-2026-90132 ntfs: reject unprivileged writes to reserved $LX* xattrs
Attackers can escalate privileges by writing to reserved NTFS extended attributes without CAP_SYS_ADMIN, requiring kernel patching.
- 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-2026-90132?
CVE-2026-90132 is a high-severity vulnerability in Linux, published on 17 Sep 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: reject unprivileged writes to reserved $LX* xattrs
Reject setxattr of the reserved $LXUID, $LXGID, $LXMOD and $LXDEV names from userspace unless the caller has CAP_SYS_ADMIN.
Which versions are affected by CVE-2026-90132?
How do I fix CVE-2026-90132?
Apply the vendor's patch.
Is CVE-2026-90132 being exploited?
There is no known exploitation of CVE-2026-90132 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-90132, GHSA-fwfw-gmx6-hm94, UBUNTU-CVE-2026-90132.