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.
7:7.1.1-1ubuntu47:7.1.2-1ubuntu37:7.1.2-1ubuntu47:7.1.3-1ubuntu17:8.0.1-2ubuntu17:8.0.1-3ubuntu17:8.0.1-3ubuntu27:8.0.1-3ubuntu2+esm17:8.0.1-3ubuntu2+esm3Exploitability
AV:NAC:LAT:PPR:NUI:PVulnerable System
VC:HVI:HVA:HSubsequent System
SC:NSI:NSA:NCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N