CVE-2026-75141 — FFmpeg Heap Buffer Overflow in hvcC Box Writer via HEVC Muxing
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 coun…
Published: 2026-08-19 · CVSS: 8.5 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7