Low severity3.3NVD Advisory· Published Oct 8, 2026
CVE-2026-107676
CVE-2026-107676
Description
FFmpeg through 9.0.2 contains an uninitialized memory disclosure vulnerability in av_dynamic_hdr_plus_to_t35() that leaves up to three payload bytes uninitialized when tone_mapping_flag is 0. Attackers can supply crafted Matroska T.35 BlockAdditional or HEVC/AV1 SEI metadata so that remuxing or transcoding writes leaked process memory into output files.
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Affected products
2Patches
Vulnerability mechanics
References
5- code.ffmpeg.org/FFmpeg/FFmpeg/commit/2c2f6e96e31795ae95a8f8323a493ffbc493111fnvd
- code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24590nvd
- ffmpeg.orgnvd
- github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavutil/hdr_dynamic_metadata.cnvd
- www.vulncheck.com/advisories/ffmpeg-through-9.0.2-uninitialized-memory-disclosure-via-hdr10-metadata-serializernvd
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