{"id":"CVE-2020-6806","details":"By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird \u003c 68.6, Firefox \u003c 74, Firefox \u003c ESR68.6, and Firefox ESR \u003c 68.6.","modified":"2026-03-15T22:36:25.922746Z","published":"2020-03-25T22:15:12.373Z","related":["MGASA-2020-0141","MGASA-2020-0142","SUSE-SU-2020:0686-1","SUSE-SU-2020:0717-1","SUSE-SU-2020:0721-1","SUSE-SU-2020:14312-1","openSUSE-SU-2020:0340-1","openSUSE-SU-2020:0366-1","openSUSE-SU-2024:10600-1","openSUSE-SU-2024:10601-1","openSUSE-SU-2024:14572-1"],"references":[{"type":"ADVISORY","url":"https://usn.ubuntu.com/4328-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4335-1/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2020-08/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2020-09/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2020-10/"},{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternal-Out-Of-Bounds-Access.html"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1612308"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"74.0"}]},{"events":[{"introduced":"0"},{"fixed":"68.6.0"}]},{"events":[{"introduced":"0"},{"fixed":"68.6.0"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"19.10"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-6806.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}