CVE-2026-54241 libde265: SAO sequential filter heap buffer overflow via signed integer overflow
A crafted HEVC stream can trigger an integer overflow in libde265, leading to heap data exposure or decoder crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-54241?
CVE-2026-54241 is a high-severity vulnerability in strukturag libde265, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.1.1 use signed 32-bit arithmetic to calculate the sample adaptive offset input-buffer size, allowing a crafted HEVC stream with large dimensions and 16-bit luma samples to cause an integer overflow, an undersized allocation, and an out-of-bounds heap read that may expose heap data in decoded output or crash the decoder. Version 1.1.1 contains a patch.
Which versions are affected by CVE-2026-54241?
How do I fix CVE-2026-54241?
Upgrade to a fixed version.
Is CVE-2026-54241 being exploited?
There is no known exploitation of CVE-2026-54241 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2026-54241, BELL-CVE-2026-54241, DEBIAN-CVE-2026-54241, ECHO-7614-b15a-45ab, GHSA-j2qq-x2xq-g9wr, MINI-fwjm-p8mg-hp9h and 2 more.