Medium severity6.1NVD Advisory· Published Nov 9, 2026

CVE-2026-125178

Description

FFmpeg through 9.0.2 contains an out-of-bounds heap read vulnerability in tdsc_load_cursor() in libavcodec/tdsc.c, which stores cursor dimensions before validating them. Attackers can supply a crafted AVI file with oversized TDSC cursor dimensions so tdsc_paint_cursor() reads past the cursor buffer, crashing the decoder or leaking heap memory into frames.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

FFmpeg/Ffmpegllm-fuzzy
Range: <=9.0.2

Patches

Vulnerability mechanics

References

code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24682nvd
github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/tdsc.cnvd
github.com/FFmpeg/FFmpeg/commit/12c589a37d093cc55618f8377b092dc21416806fnvd
www.vulncheck.com/advisories/ffmpeg-through-9.0.2-out-of-bounds-heap-read-via-tdsc-cursor-dimensionsnvd

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cvss	0.397
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000