CVE-2026-80598 ntfs3: fix out-of-bounds read in decompress_lznt
A local attacker can trigger an out-of-bounds read in the Linux kernel's NTFS3 driver via a corrupted image, potentially causing a crash or leaking memory.
- 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-2026-80598?
CVE-2026-80598 is a high-severity memory corruption vulnerability in Linux, published on 28 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:
ntfs3: fix out-of-bounds read in decompress_lznt
decompress_lznt() does not validate array index bounds before accessing the decompression table. A corrupted NTFS3 image with invalid compressed data can trigger an out-of-bounds read.
Add index bounds checking to prevent the OOB access.
Which versions are affected by CVE-2026-80598?
How do I fix CVE-2026-80598?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-80598 being exploited?
There is no known exploitation of CVE-2026-80598 in the wild and no public exploit code.
Sources
Also known as AZL-98135, BELL-CVE-2026-80598, DEBIAN-CVE-2026-80598, GHSA-3h3p-2268-63w8, UBUNTU-CVE-2026-80598.