Medium severity4.7NVD Advisory· Published Nov 9, 2026

CVE-2026-125071

Description

FFmpeg through 9.0.2 contains a NULL pointer dereference vulnerability in libavcodec/jvdec.c that allows attackers to crash applications by supplying oversized JV video packets. Attackers can pass a roughly 268435460-byte packet through the libavcodec API, overflowing the bit count so decode_frame() reads from a NULL buffer and causes denial of service.

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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/25704nvd
github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/jvdec.cnvd
github.com/FFmpeg/FFmpeg/commit/839c93f261cd3e1719edfac4244a2d0055ce8841nvd
www.vulncheck.com/advisories/ffmpeg-through-9.0.2-null-pointer-dereference-in-jv-video-decodernvd

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cvss	0.306
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000