CVE-2026-125176
LOW
NVD
CVSS Score
3.3
Severity
LOW
Published
Nov 09, 2026
Vendor
unknown
Description
FFmpeg through 9.0.2 contains an uninitialized memory read vulnerability in decode_hybrid() in libavcodec/flashsv.c that reads past decompressed data when decoding 15-bit color pixels. Attackers can supply a crafted Flash Screen Video 2 block whose inflated data ends mid-pixel to leak heap memory into decoded output frames.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24474
- https://github.com/FFmpeg/FFmpeg
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/flashsv.c#L89
- https://github.com/FFmpeg/FFmpeg/commit/16d0f7f408ba47b4091a22109d4f22f5fd57820a
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-uninitialized-memory-read-in-flash-screen-video-2-decoder