{"id":"CVE-2026-125254","title":"FFmpeg through 9.0.2 Division by Zero via VVC ff_vvc_slice_rpl()","summary":"FFmpeg through 9.0.2 contains a division by zero vulnerability in the VVC decoder because ff_vvc_slice_rpl() fails to validate num_ref_idx_active against built reference list entries. Attackers can supply a crafted VVC bitstream whose ex…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-369"],"vendor":"FFmpeg","product":"FFmpeg","affected":["FFmpeg <= 9.0.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-09T20:55:19.505683Z"},"published":"2026-11-09","updated":"2026-11-09","sourceUpdated":"2026-11-09T20:56:48.691Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-125254","references":[{"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25572"},{"url":"https://github.com/FFmpeg/FFmpeg/commit/8732d7585cd8ab9d1dd9baeb4db5e93466c0efa7","label":"Patch Commit"},{"url":"https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vvc/mvs.c#L77"},{"url":"https://github.com/FFmpeg/FFmpeg"},{"url":"https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-division-by-zero-via-vvc-ff-vvc-slice-rpl","label":"VulnCheck Advisory: FFmpeg through 9.0.2 Division by Zero via VVC ff_vvc_slice_rpl()"}],"tags":["cve.org"],"ingestedAt":"2026-11-09T20:27:27.087Z","slug":"CVE-2026-125254","body":"## Overview\n\nFFmpeg through 9.0.2 contains a division by zero vulnerability in the VVC decoder because ff_vvc_slice_rpl() fails to validate num_ref_idx_active against built reference list entries. Attackers can supply a crafted VVC bitstream whose excess reference indices yield a zero POC difference in ff_vvc_mv_scale(), crashing the decoding process.\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.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}