FFmpeg through 9.0.2 Out-of-Bounds Read via bitpacked_decode_uyvy422()

Advisories

FFmpeg through 9.0.2 Out-of-Bounds Read via bitpacked_decode_uyvy422()

Severity: medium
Date: 11/9/2026
Affecting: FFmpeg <= 9.0.2
CVE: CVE-2026-125193
CWE: CWE-125 Out-of-bounds Read
CVSS: 6.9
CVSS V4 Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
References: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25702
Patch Commit
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/bitpacked_dec.c#L52
https://github.com/FFmpeg/FFmpeg
Credit: Joshua Rogers (AISLE Research), Michael Niedermayer
Description: FFmpeg through 9.0.2 contains an out-of-bounds read vulnerability in bitpacked_decode_uyvy422() in libavcodec/bitpacked_dec.c because it never verifies packets hold width * height * 2 bytes. Attackers can supply truncated bitpacked UYVY422 packets via crafted SDP/RFC 4175 RTP sessions or raw input to crash applications or expose adjacent heap memory.

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