CVE-2026-75141CWE-122

CVE-2026-75141

High · published August 19, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
9.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
8.5 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00199 · 9.2th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-08-19T21:21Z
References (3)
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/acf5d7cdc1f9ae8752c23e1ea8d7f355ed780781 · [email protected]https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24088 · [email protected]https://www.vulncheck.com/advisories/ffmpeg-heap-buffer-overflow-in-hvcc-box-writer-via-hevc-muxing · [email protected]
EPSS history
Timeline
  • 19 AUG 16:24Z
    FFmpeg Heap Buffer Overflow in hvcC Box Writer via HEVC Muxing
    cvelistv5