| Name | CVE-2026-38347 |
| Description | A heap overflow in the ff_sws_alphablendaway function (libswscale/alphablend.c) of FFmpeg git-master commit 722a217 allows attackers to cause a Denial of Service (DoS) via a crafted input. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6361-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| ffmpeg (PTS) | bullseye | 7:4.3.7-0+deb11u1 | vulnerable |
| bullseye (security) | 7:4.3.9-0+deb11u2 | vulnerable |
| bookworm, bookworm (security) | 7:5.1.9-0+deb12u1 | vulnerable |
| trixie (security), trixie | 7:7.1.5-0+deb13u1 | fixed |
| forky, sid | 7:8.1.2-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| ffmpeg | source | trixie | 7:7.1.5-0+deb13u1 | | DSA-6361-1 | |
| ffmpeg | source | (unstable) | 7:8.0.1-2 | | | |
Notes
https://trac.ffmpeg.org/ticket/11692
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20063
Fixed by: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/b7946098b19af4f06661213d591a5ed9cd3d26ff (n8.0)
Fixed by: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/bb88e295394e5db584063bde790bfbdba04d54ec (n7.1.5)
Fixed by: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/7ee2f9004bd292cbe98deea3664dc00223d4275c (n5.1.10)