CVE-2026-75141
HighCVSS 7.8Summary
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 the overflow during muxing.
Risk Assessment
An attacker may cause memory corruption, potentially leading to application crashes or remote code execution.
Recommendation
Update FFmpeg to a version containing commit acf5d7c or later.
Original NVD description (English source)
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 the overflow during muxing.