CVE-2026-107676 FFmpeg through 9.0.2 Uninitialized Memory Disclosure via HDR10+ Metadata Serializer

FFmpeg through 9.0.2 contains an uninitialized memory disclosure vulnerability in avdynamichdrplustot35 that leaves up to three payload bytes uninitialized when tonemappingflag is 0. Attackers can supply crafted Matroska T.35 BlockAdditional or HEVC/AV1 SEI metadata so that remuxing or transcodin...

CVE-2026-107676

FFmpeg versions through 9.0.2 are vulnerable to an uninitialized memory disclosure within the av_dynamic_hdr_plus_to_t35() function. When the tone_mapping_flag is set to 0, the function fails to initialize up to three payload bytes. An attacker can exploit this by providing crafted Matroska T.35 ...