CVE-2026-125236

medium

Description

FFmpeg through 9.0.2 contains a memory leak vulnerability in alloc_frame() in libavcodec/vvc/refs.c that leaks SPS and PPS references when frame buffer allocation fails. Attackers can supply a crafted VVC (H.266) stream that repeatedly replaces parameter sets, steadily growing memory use and causing denial of service.

References

https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-vvc-decoder-memory-leak-via-alloc-frame

https://github.com/FFmpeg/FFmpeg/commit/a13e27336a61a3452e1ab8b4bb132c4174c67498

https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vvc/refs.c#L133

https://github.com/FFmpeg/FFmpeg

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-120186

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25088

Details

Source: Mitre, NVD

Published: 2026-11-09

Updated: 2026-11-10

Risk Information

CVSS v2

Base Score: 2.1

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

Severity: Low

CVSS v3

Base Score: 3.3

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

Severity: Low

CVSS v4

Base Score: 4.8

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

Severity: Medium

EPSS

EPSS: 0.00118