CVE-2026-66041 – FFmpeg 7.0 – 8.1.2 Heap Out-of-Bounds Write via vf_quirc Filter

CVE ID :CVE-2026-66041

Published : July 24, 2026, 8:18 p.m. | 1 hour, 32 minutes ago

Description :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: 8.8 | HIGH

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