Medium severity5.5NVD Advisory· Published Nov 1, 2026

CVE-2026-120243

Description

FFmpeg 2.0 through 9.0.2 contains a use of uninitialized variable vulnerability in the Go2Meeting decoder that allows attackers to leak stack memory through out-of-range palette indices. Attackers can craft a G2M3/G2M4 stream with a short Kempf palette so kempf_restore_buf() copies uninitialized stack bytes, including pointers or stack guards, into decoded output.

AI Insight

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

Affected products

FFmpeg/Ffmpegllm-fuzzy
Range: 2.0 through 9.0.2

Patches

Vulnerability mechanics

References

code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24858nvd
github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/g2meet.cnvd
github.com/FFmpeg/FFmpeg/commit/edad2d0dafcf44fa315eab716fd0183ce808053bnvd
www.vulncheck.com/advisories/ffmpeg-2.0-through-9.0.2-information-disclosure-via-g2m-kempf-palettenvd

News mentions

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cvss	0.358
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000