CVE-2026-63793 ntfs: serialize volume label accesses
A race condition in the Linux kernel NTFS driver allows a use-after-free, potentially enabling local attackers to execute code or escalate privileges.
- 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-2026-63793?
CVE-2026-63793 is a high-severity use after free vulnerability in Linux kernel, published on 19 Jul 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: serialize volume label accesses
Protect vol->volume_label with a mutex and snaphost the label before copy_to_user. This prevent a use-after-free when FS_IOC_SETFSLABEL replaces the vol->volume_label and FS_IOC_GETTSLABEL reads it concurrently.
Weakness: CWE-416
Which versions are affected by CVE-2026-63793?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-63793?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-63793 being exploited?
There is no known exploitation of CVE-2026-63793 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as GHSA-j6f5-rrpr-78g3, ROOT-OS-UBUNTU-2204-CVE-2026-63793, UBUNTU-CVE-2026-63793.