CVE-2026-125191 (GCVE-0-2026-125191)

Vulnerability from cvelistv5 – Published: 2026-11-09 19:11 – Updated: 2026-11-09 21:06
VLAI
Title
FFmpeg through 9.0.2 V4L2 M2M Decoder Deadlock via Reference Count Leak
Summary
FFmpeg through 9.0.2 contains a reference count leak in libavcodec/v4l2_buffers.c that allows attackers to deadlock the V4L2 mem2mem decoder on multi-plane capture formats. Attackers can supply crafted H.264, HEVC, or VP9 streams with resolution changes, making ff_v4l2_m2m_codec_reinit() wait forever and hang the decoding application.
Severity
5.7 (Medium)
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 21:01 UTC
CWE
  • CWE-911 - Improper Update of Reference Count
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
FFmpeg FFmpeg Affected: 0 , ≤ 9.0.2 (semver)
    cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-11-02 00:00
Credits
Joshua Rogers (AISLE Research) Michael Niedermayer
Show details on NVD website
To clipboard 

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