FFmpeg through 9.0.2 contains an uninitialized memory disclosure vulnerability in adpcmencodeframe() in libavcodec/adpcmenc.c that leaks…
CVE-2026-125195
FFmpeg through 9.0.2 contains an uninitialized memory disclosure vulnerability in adpcmencodeframe() in libavcodec/adpcmenc.c that leaks heap bytes when encoding mono ADPCMMS 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.
Assessment
- CVSS
- 2 (v4.0)
- Severity
- Low
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 9 November 2026
- Last updated
- 9 November 2026
- Assigner
- VulnCheck
CVSS vectorCVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
At the source
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25694
- 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://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-uninitialized-memory-disclosure-via-adpcm-ms-trellis-encoding
- https://nvd.nist.gov/vuln/detail/CVE-2026-125195
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