CVE-2026-75141

FFmpeg versions before commit acf5d7c have a heap buffer overflow in the hvcC box writer. A crafted HEVC file triggers NAL unit count overflow during muxing, leading to memory corruption; CVSS 3.1 scores it HIGH (7.8). No exploitation is confirmed. Upgrade to a version containing the fix commit. ...

EUVD-2026-62578

FFmpeg before commit acf5d7c contains a heap buffer overflow in the hvcC box writer. When writing an HEVC configuration record with more NAL units of a single type than the count field can represent, the NAL unit count overflows, causing a heap buffer overflow. A crafted HEVC input file triggers...