CVE-2026-66041 — FFmpeg 7.0 - 8.1.2 Heap Out-of-Bounds Write via vf_quirc Filter
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 sup…
Published: 2026-07-24 · CVSS: 7.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7