CVE-2026-93055 UDF symlink pathComponent header OOB read
A local attacker can trigger an out-of-bounds read in the Linux kernel UDF filesystem driver by providing malformed symlink data, potentially causing a crash or leaking memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93055?
CVE-2026-93055 is a memory corruption 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:
UDF symlink pathComponent header OOB read
udf_symlink_filler() can enter udf_pc_to_char() with a partial pathComponent header.
Validate that enough input remains for a complete pathComponent header before accessing it. Reject malformed symlink data that would otherwise make udf_pc_to_char() perform an out-of-bounds read.
Which versions are affected by CVE-2026-93055?
How do I fix CVE-2026-93055?
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-2026-93055 being exploited?
There is no known exploitation of CVE-2026-93055 in the wild and no public exploit code.
Sources
Also known as AZL-102602, BELL-CVE-2026-93055, DEBIAN-CVE-2026-93055, GHSA-656h-699m-59g6, UBUNTU-CVE-2026-93055.