{"id":"CVE-2026-120247","title":"FFmpeg 2.3 through 9.0.2 Huffyuv Decoder Uninitialized Heap Memory Disclosure","summary":"FFmpeg 2.3 through 9.0.2 contains a use of uninitialized resource vulnerability in the Huffyuv decoder that allows attackers to leak heap memory into decoded pixels via short packed-BGR bitstreams. Attackers can craft a Huffyuv BGR24/BGR…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cvssSource":"cna","cwe":["CWE-908"],"vendor":"FFmpeg","product":"FFmpeg","affected":["FFmpeg >= 2.3 <= 9.0.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T18:55:40.837645Z"},"published":"2026-11-01","updated":"2026-11-06","sourceUpdated":"2026-11-06T18:56:15.087Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-120247","references":[{"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24869"},{"url":"https://github.com/FFmpeg/FFmpeg/commit/7c73707355708c846f718cca90096bc1a33c8989"},{"url":"https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/huffyuvdec.c#L802"},{"url":"https://github.com/FFmpeg/FFmpeg"},{"url":"https://www.vulncheck.com/advisories/ffmpeg-2.3-through-9.0.2-huffyuv-decoder-uninitialized-heap-memory-disclosure","label":"VulnCheck Advisory: FFmpeg 2.3 through 9.0.2 Huffyuv Decoder Uninitialized Heap Memory Disclosure"}],"tags":["cve.org"],"epss":0.00124,"epssPercentile":0.02129,"ingestedAt":"2026-11-05T18:28:50.669Z","slug":"CVE-2026-120247","body":"## Overview\n\nFFmpeg 2.3 through 9.0.2 contains a use of uninitialized resource vulnerability in the Huffyuv decoder that allows attackers to leak heap memory into decoded pixels via short packed-BGR bitstreams. Attackers can craft a Huffyuv BGR24/BGRA video whose entropy data ends early, causing decode_slice() to add uninitialized s->temp[0] bytes into output frames, exposing heap contents.\n\n## Affected\n\n- `FFmpeg >= 2.3 <= 9.0.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}