CVE-2026-125250
HIGH
MEDIUM
Priority: 0.01
BB Relevance:
42/100
Published: 2026-11-09
Modified: 2026-11-13
First seen: 2026-11-09
Status: active
Attack Surface
Low Complexity
No Auth
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
None
UI:
Passive
AT:
None
VC:
High
VI:
High
VA:
High
Description
FFmpeg through 9.0.2 contains a heap buffer overflow in the GIF encoder's gif_image_write_image() in libavcodec/gif.c because shrunk_buf is sized from the first frame's linesize. Attackers can supply PAL8 video whose frame linesize grows mid-stream, causing remap_frame_to_palette() to write past shrunk_buf and corrupt the heap during GIF transcoding.