CVE-2026-75141

EUVD-2026-62578
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 8.8%
Debian logo
Debian Releases
Debian Product
Codename
ffmpeg
bookworm
vulnerable
bookworm (security)
vulnerable
forky
7:9.0.2-1
fixed
sid
7:9.0.2-1
fixed
trixie
postponed
trixie (security)
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
ffmpeg
bionic
Fixed 7:3.4.11-0ubuntu0.1+esm15
released
focal
Fixed 7:4.2.7-0ubuntu0.1+esm16
released
jammy
Fixed 7:4.4.2-0ubuntu0.22.04.1+esm15
released
noble
Fixed 7:6.1.1-3ubuntu5+esm13
released
resolute
Fixed 7:8.0.1-3ubuntu2+esm4
released
xenial
Fixed 7:2.8.17-0ubuntu0.1+esm17
released
libav
jammy
dne
noble
dne
resolute
dne
trusty
needs-triage
Common Weakness Enumeration
References
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/acf5d7cdc1f9ae8752c23e1ea8d7f355ed780781
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24088
https://www.vulncheck.com/advisories/ffmpeg-heap-buffer-overflow-in-hvcc-box-writer-via-hevc-muxing