{"id":"CVE-2021-43537","details":"An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash. This vulnerability affects Thunderbird \u003c 91.4.0, Firefox ESR \u003c 91.4.0, and Firefox \u003c 95.","modified":"2026-03-15T22:42:13.148643Z","published":"2021-12-08T22:15:09.620Z","related":["ALSA-2021:5013","ALSA-2021:5045","MGASA-2021-0551","MGASA-2021-0554","SUSE-SU-2021:14859-1","SUSE-SU-2021:3993-1","SUSE-SU-2021:3995-1","SUSE-SU-2021:4000-1","SUSE-SU-2021:4150-1","openSUSE-SU-2021:1575-1","openSUSE-SU-2021:1635-1","openSUSE-SU-2021:3993-1","openSUSE-SU-2021:4150-1","openSUSE-SU-2024:11669-1","openSUSE-SU-2024:11670-1","openSUSE-SU-2024:14572-1"],"references":[{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202208-14"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5034"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-52/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-53/"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html"},{"type":"ADVISORY","url":"https://www.debian.org/security/2021/dsa-5026"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-54/"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202202-03"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1738237"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"95.0"}]},{"events":[{"introduced":"0"},{"fixed":"91.4.0"}]},{"events":[{"introduced":"0"},{"fixed":"91.4.0"}]},{"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/cve-osv-conversion/osv-output/CVE-2021-43537.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"}]}