CVE-2026-75141: Ffmpeg

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Ffmpeg Ffmpeg

Published 2026-08-19. Last modified 2026-08-31.