Medium severity4.7NVD Advisory· Published Nov 9, 2026
CVE-2026-125189
CVE-2026-125189
Description
FFmpeg 8.1 through 9.0.2 contains a denial of service vulnerability in the lcevc_metadata bitstream filter caused by a process block position mismatch in lcevc_metadata_handle_vui(). Attackers can supply crafted LCEVC access units with two IDR or non-IDR NAL units to trigger an av_assert0 failure in ff_cbs_lcevc_list_add(), aborting the application.
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Affected products
1Patches
Vulnerability mechanics
References
4- code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25408nvd
- github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/bsf/lcevc_metadata.cnvd
- github.com/FFmpeg/FFmpeg/commit/0747459f0c6f228566f5cb11ceed56b977208582nvd
- www.vulncheck.com/advisories/ffmpeg-8.1-through-9.0.2-denial-of-service-via-lcevc-metadata-bitstream-filternvd
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