CVE-2026-125073
MEDIUM
NVD
CVSS Score
5.5
Severity
MEDIUM
Published
Nov 09, 2026
Vendor
unknown
Description
FFmpeg through 9.0.2 contains an infinite loop vulnerability in bit_allocation() in libavcodec/imc.c that allows attackers to hang decoding by supplying audio blocks with a negative bit budget. Attackers can craft IMC or IAC audio files that drive freebits negative, causing the reduction loop to never terminate and consuming 100% CPU.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25696
- https://github.com/FFmpeg/FFmpeg
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/imc.c#L572
- https://github.com/FFmpeg/FFmpeg/commit/9b26bb4c9a4457d480899a1bf64ec080eceb1acd
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-infinite-loop-denial-of-service-via-imc-iac-decoder