CVE-2026-66039 — FFmpeg MACE6 Audio Decoder Heap Out-of-Bounds Write via CAF File
FFmpeg through 8.1.2, fixed in commit aafb5c6, contains a signed integer overflow vulnerability in the MACE6 audio decoder that allows attackers to corrupt heap memory by supply…
Published: 2026-07-24 · CVSS: 8.7 · CVSS 4.0
FFmpeg through 8.1.2, fixed in commit aafb5c6, contains a signed integer overflow vulnerability in the MACE6 audio decoder that allows attackers to corrupt heap memory by supplying a crafted CAF file with a malicious bytes_per_packet value. Attackers can craft a CAF file with oversized bytes_per_packet and frames_per_packet values in the desc chunk to trigger an integer overflow in mace_decode_frame() during output sample count computation, resulting in an undersized buffer allocation and heap out-of-bounds write that could enable code execution.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7