{"id":"CVE-2026-125263","title":"FFmpeg 9.0 through 9.0.2 Memory Exhaustion via LCEVC Enhancement Dimensions","summary":"FFmpeg 9.0 through 9.0.2 built with liblcevc_dec fails to validate LCEVC enhanced output dimensions against max_pixels in libavcodec/decode.c before frame allocation. Attackers can supply crafted H.264, HEVC or VVC streams declaring huge…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-789"],"vendor":"FFmpeg","product":"FFmpeg","affected":["FFmpeg >= 9.0 <= 9.0.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-09T20:54:46.620010Z"},"published":"2026-11-09","updated":"2026-11-09","sourceUpdated":"2026-11-09T20:56:48.418Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-125263","references":[{"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25408"},{"url":"https://github.com/FFmpeg/FFmpeg/commit/60b286521b46caa09792af04c6a4e3437aac8293","label":"Patch Commit"},{"url":"https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/decode.c#L1660"},{"url":"https://github.com/FFmpeg/FFmpeg"},{"url":"https://www.vulncheck.com/advisories/ffmpeg-9.0-through-9.0.2-memory-exhaustion-via-lcevc-enhancement-dimensions","label":"VulnCheck Advisory: FFmpeg 9.0 through 9.0.2 Memory Exhaustion via LCEVC Enhancement Dimensions"}],"tags":["cve.org"],"ingestedAt":"2026-11-09T20:27:27.078Z","slug":"CVE-2026-125263","body":"## Overview\n\nFFmpeg 9.0 through 9.0.2 built with liblcevc_dec fails to validate LCEVC enhanced output dimensions against max_pixels in libavcodec/decode.c before frame allocation. Attackers can supply crafted H.264, HEVC or VVC streams declaring huge LCEVC resolutions to force oversized get_buffer2() allocations and exhaust memory.\n\n## Affected\n\n- `FFmpeg >= 9.0 <= 9.0.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}