{"id":"UBUNTU-CVE-2020-36430","details":"libass 0.15.x before 0.15.1 has a heap-based buffer overflow in decode_chars (called from decode_font and process_text) because the wrong integer data type is used for subtraction.","modified":"2025-07-16T07:41:38.282894Z","published":"2021-07-20T07:15:00Z","withdrawn":"2025-07-18T16:46:17Z","upstream":["CVE-2020-36430"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-36430"},{"type":"REPORT","url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26674"},{"type":"REPORT","url":"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libass/OSV-2020-2099.yaml"},{"type":"REPORT","url":"https://github.com/libass/libass/commit/017137471d0043e0321e377ed8da48e45a3ec632"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-36430"}],"affected":[{"package":{"name":"libass","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libass@1:0.15.2-1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.15.2-1"}]}],"versions":["1:0.15.0-2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libass-dev","binary_version":"1:0.15.2-1"},{"binary_name":"libass9","binary_version":"1:0.15.2-1"},{"binary_name":"libass9-dbgsym","binary_version":"1:0.15.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-36430.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}