CVE-2026-125270

medium

Description

FFmpeg through 9.0.2 contains a heap out-of-bounds read vulnerability in v4l2_buffer_swframe_to_buf() in libavcodec/v4l2_buffers.c that mishandles frames with negative linesize. Attackers can supply bottom-up AVI or PNM/PFM files that are transcoded to a V4L2 M2M encoder, crashing the application or leaking heap memory into encoded output.

References

https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-out-of-bounds-read-in-v4l2-m2m-encoder

https://github.com/FFmpeg/FFmpeg/commit/b8f159858e2fd29dae4fa34d9e713bbf9bbf190e

https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/v4l2_buffers.c#L410

https://github.com/FFmpeg/FFmpeg

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-120220

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24328

Details

Source: Mitre, NVD

Published: 2026-11-09

Updated: 2026-11-10

Risk Information

CVSS v2

Base Score: 4.7

Vector: CVSS2#AV:L/AC:H/Au:N/C:P/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.3

Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H

Severity: Medium

CVSS v4

Base Score: 5.8

Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00122