CVE-2026-125195

low

Description

FFmpeg through 9.0.2 contains an uninitialized memory disclosure vulnerability in adpcm_encode_frame() in libavcodec/adpcmenc.c that leaks heap bytes when encoding mono ADPCM_MS audio with trellis enabled. Attackers submitting audio to a service using this encoding receive output packets where about half of each block contains stale heap memory from the encoding process.

References

https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-uninitialized-memory-disclosure-via-adpcm-ms-trellis-encoding

https://github.com/FFmpeg/FFmpeg/commit/fb13409aaffc151f602ad357db46052e98ea46e8

https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/adpcmenc.c#L785

https://github.com/FFmpeg/FFmpeg

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-120284

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25694

Details

Source: Mitre, NVD

Published: 2026-11-09

Updated: 2026-11-10

Risk Information

CVSS v2

Base Score: 1.2

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

Severity: Low

CVSS v3

Base Score: 2.5

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

Severity: Low

CVSS v4

Base Score: 2

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

Severity: Low

EPSS

EPSS: 0.00121