High severity7.0NVD Advisory· Published Nov 9, 2026

CVE-2026-125251

Description

FFmpeg through 9.0.2 contains an integer overflow vulnerability in the VVC decoder alloc_frame() function in libavcodec/vvc/refs.c that undersizes the reference picture list allocation on 32-bit builds. Attackers can supply a crafted VVC (H.266) file with a very large number of NAL units per access unit to trigger heap out-of-bounds writes and corrupt memory.

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/25572nvd
github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vvc/refs.cnvd
github.com/FFmpeg/FFmpeg/commit/053660fdb0d2403b838690689c47ad7685c3b10bnvd
www.vulncheck.com/advisories/ffmpeg-through-9.0.2-vvc-decoder-heap-out-of-bounds-write-via-refs-cnvd

News mentions

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cvss	0.455
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000