{"action":"Upgrade ffmpeg4 to 4.1-r0 or later.","affected":[{"fixed":"4.1-r0","introduced":"0"}],"component":"ffmpeg4","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.17","exploited":false,"fixed_versions":["4.1-r0"],"id":"tcs_01M6GDPASAN91XQ1KEC727M824","modified_at":"2026-11-03T06:31:14.588481410Z","published_at":"2018-07-05T17:29:00.610Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2018-13305","https://security.alpinelinux.org/vuln/CVE-2018-13305"],"severity":{"label":"high","score":8.1},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2018-13305#Alpine:v3.17/ffmpeg4","url":"https://osv.dev/vulnerability/ALPINE-CVE-2018-13305"}],"summary":"In FFmpeg 4.0.1, due to a missing check for negative values of the mquant variable, the vc1_put_blocks_clamped function in libavcodec/vc1_block.c may trigger an out-of-array access while converting a"}