CVE-2026-75141
HIGH
NVD
CVSS Score
7.8
Severity
HIGH
Published
Aug 19, 2026
Vendor
unknown
Description
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.