{"id":"CVE-2026-107676","title":"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","summary":"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 Bl…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","cwe":["CWE-908"],"vendor":"ffmpeg","product":"ffmpeg","affected":["ffmpeg <= 9.0.2"],"published":"2026-10-08","updated":"2026-10-14","sourceUpdated":"2026-10-14T23:55:20.810","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107676","references":[{"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/2c2f6e96e31795ae95a8f8323a493ffbc493111f","label":"disclosure@vulncheck.com"},{"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24590","label":"disclosure@vulncheck.com"},{"url":"https://ffmpeg.org/","label":"disclosure@vulncheck.com"},{"url":"https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavutil/hdr_dynamic_metadata.c#L374-L385","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-uninitialized-memory-disclosure-via-hdr10-metadata-serializer","label":"disclosure@vulncheck.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-107676.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-107676"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2548035"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-107676"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107676"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00142,"epssPercentile":0.03568,"ingestedAt":"2026-10-08T15:49:37.998Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-14T00:59:44.930454Z"},"slug":"CVE-2026-107676","body":"## Overview\n\nFFmpeg 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.\n\n## Affected\n\n- `ffmpeg <= 9.0.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI) · no fix planned: Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI) · updated 2026-10-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-107676.json)","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}