CVE-2026-66041 (GCVE-0-2026-66041)
Vulnerability from cvelistv5 – Published: 2026-07-24 19:54 – Updated: 2026-07-29 03:55 X_Open Source
VLAI
EPSS
VEX
Title
FFmpeg 7.0 - 8.1.2 Heap Out-of-Bounds Write via vf_quirc Filter
Summary
FFmpeg 7.0 through 8.1.2, fixed in commit 4da9812, contains a heap out-of-bounds write vulnerability in the vf_quirc filter that allows an attacker to corrupt heap memory by supplying a crafted PGS/SUP subtitle file with mismatched frame dimensions. Attackers can provide a subtitle file whose second presentation has larger dimensions than its first, causing av_image_copy_plane() to copy data exceeding the initial allocation size into the undersized libquirc grayscale image buffer, resulting in heap corruption and process crash with potential for code execution.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 00:00 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23625 | issue-tracking |
| https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/4da9… | patch |
| https://www.vulncheck.com/advisories/ffmpeg-heap-… | third-party-advisory |
Impacted products
Date Public
2026-07-04 00:00
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