CVE-2026-125234
MEDIUM
NVD
CVSS Score
5.5
Severity
MEDIUM
Published
Nov 09, 2026
Vendor
unknown
Description
FFmpeg through 9.0.2 contains an integer overflow vulnerability in wavpack_encode_init() in libavcodec/wavpackenc.c that causes an infinite loop when computing block size from sample rate and channel count. Attackers can supply a crafted audio file, such as a WAV header declaring a huge sample rate with many channels, to hang applications transcoding to WavPack.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25694
- https://github.com/FFmpeg/FFmpeg
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/wavpackenc.c#L147
- https://github.com/FFmpeg/FFmpeg/commit/e621da8ecdbef8edb8336cc899b962159dc2465c
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-wavpack-encoder-integer-overflow-infinite-loop-via-wavpack-encode-init