High severity7.8NVD Advisory· Published Nov 9, 2026

CVE-2026-125262

Description

FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in libavcodec/lcevcdec.c because LCEVC output picture dimensions are not validated against the allocated frame. Attackers can embed crafted LCEVC enhancement data with differing global configurations in H.264 or HEVC streams to corrupt heap memory in decoding applications.

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/25067nvd
github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/lcevcdec.cnvd
github.com/FFmpeg/FFmpeg/commit/fd6dfa613a48665dcb8d14186b33dad90aa40ae0nvd
www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-buffer-overflow-via-lcevc-enhancement-decodingnvd

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cvss	0.507
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000