JLSEC-2026-1180 High 7.3
FFmpeg versions 3.4 through 8.1.2 contain an out-of-bounds write vulnerability in the...
FFmpeg versions 3.4 through 8.1.2 contain an out-of-bounds write vulnerability in the vf_floodfill video filter that allows attackers to corrupt heap memory by supplying a dynamically sized video stream with filtergraph reinitialization disabled via -reinit_filter 0. When config_input() allocates the points traversal stack based on initial frame dimensions and a subsequent larger frame is processed, filter_frame() performs flood-fill neighbor pushes beyond the original allocation boundary, resulting in heap corruption and process crash with potential for code execution depending on heap layout and process hardening.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/f186c50cf53aec20e9a29059cb22ca3f2d59201c
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23780
- https://github.com/advisories/GHSA-gf7r-r5xq-r3hm
- https://nvd.nist.gov/vuln/detail/CVE-2026-65705
- https://www.vulncheck.com/advisories/ffmpeg-vf-floodfill-out-of-bounds-write-via-filter-frame