{"id":"CVE-2026-107676","summary":"FFmpeg through 9.0.2 Uninitialized Memory Disclosure via HDR10+ Metadata Serializer","details":"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.","modified":"2026-10-10T02:47:25.700587151Z","published":"2026-10-08T15:28:41.795Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-908"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107676.json"},"references":[{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg"},{"type":"WEB","url":"https://ffmpeg.org/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107676.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107676"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-uninitialized-memory-disclosure-via-hdr10-metadata-serializer"},{"type":"FIX","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/2c2f6e96e31795ae95a8f8323a493ffbc493111f"},{"type":"FIX","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24590"},{"type":"ARTICLE","url":"https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavutil/hdr_dynamic_metadata.c#L374-L385"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ffmpeg/ffmpeg","events":[{"introduced":"0"},{"fixed":"946fcce07b6dcd0331c8cc609192aeff5e1924f8"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"9.0.2"},{"fixed":"9.0.2"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["n9.0.1","n9.0","n8.2-dev","n8.1-dev","n7.2-dev","n7.1-dev","n6.2-dev","n6.1-dev","n5.2-dev","n5.1-dev","n4.5-dev","n4.4-dev","n4.3-dev","n4.2-dev","n4.1-dev","n3.5-dev","n3.4-dev","n3.3-dev","n3.2-dev","n3.1-dev","n2.9-dev","n2.8-dev","n2.7-dev","n2.6-dev","n2.5-dev","n2.4-dev","n2.3-dev","n2.2-dev","n2.0","n2.1-dev","n1.3-dev","n1.2-dev","n1.1-dev","n0.12-dev","n0.11-dev","n0.8","N"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107676.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"}]}