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 vfquirc 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 seco...