CVE-2026-125246
Discovered by AISLEPUBLISHEDCWE-617
Description
FFmpeg through 9.0.2 contains a denial of service vulnerability in cbs_jpeg_assemble_fragment() that miscounts 0xff stuffing bytes in JPEG scan headers. Attackers can supply a crafted JPEG/MJPEG stream with 0xff in the scan header, triggering an av_assert0 abort when CBS-based bitstream filters process it.
CVSS Base Scores
CVSS v4.05.7
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS v3.1
4.7CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Version | Status |
|---|---|---|---|
| FFmpeg | FFmpeg | 0 | affected |
Credits
- Joshua Rogers (AISLE Research)(finder)
- Michael Niedermayer(remediation developer)
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25232
- https://github.com/FFmpeg/FFmpeg/commit/ee457fdcdb3a069ef35910a2e1cacff10906b131
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/cbs_jpeg.c#L365
- https://github.com/FFmpeg/FFmpeg
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-assertion-failure-dos-via-cbs-jpeg-assemble-fragment