{"id":"CVE-2021-38496","details":"During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird \u003c 78.15, Thunderbird \u003c 91.2, Firefox ESR \u003c 91.2, Firefox ESR \u003c 78.15, and Firefox \u003c 93.","modified":"2026-04-16T00:03:10.216314328Z","published":"2021-11-03T01:15:07.380Z","related":["SUSE-SU-2021:14826-1","SUSE-SU-2021:3331-1","SUSE-SU-2021:3446-1","SUSE-SU-2021:3451-1","SUSE-SU-2021:4150-1","openSUSE-SU-2021:1367-1","openSUSE-SU-2021:1635-1","openSUSE-SU-2021:3331-1","openSUSE-SU-2021:3451-1","openSUSE-SU-2021:4150-1","openSUSE-SU-2024:11570-1","openSUSE-SU-2024:11571-1","openSUSE-SU-2024:14572-1"],"references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-43/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-44/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-45/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-46/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-47/"},{"type":"REPORT","url":"https://www.debian.org/security/2022/dsa-5034"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1725335"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"93.0"}]},{"events":[{"introduced":"91.0"},{"fixed":"91.2"}]},{"events":[{"introduced":"0"},{"fixed":"78.15"}]},{"events":[{"introduced":"0"},{"fixed":"78.15"}]},{"events":[{"introduced":"91.0"},{"fixed":"91.2"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]},{"events":[{"introduced":"0"},{"last_affected":"11.0"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-38496.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"}]}