{"schema_version":"1.7.5","id":"CVE-2021-29945","published":"2021-06-24T14:15:09.763Z","modified":"2026-04-16T04:36:57.377862438Z","related":["SUSE-SU-2021:1307-1","SUSE-SU-2021:1325-1","SUSE-SU-2021:1432-1","SUSE-SU-2021:1433-1","SUSE-SU-2021:14708-1","openSUSE-SU-2021:0621-1","openSUSE-SU-2021:0644-1","openSUSE-SU-2024:10600-1","openSUSE-SU-2024:10601-1","openSUSE-SU-2024:14572-1"],"details":"The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash. *Note: This issue only affected x86-32 platforms. Other platforms are unaffected.*. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.","affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29945.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"88.0"}]},{"events":[{"introduced":"0"},{"fixed":"78.10"}]},{"events":[{"introduced":"0"},{"fixed":"78.10"}]}]}}],"references":[{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-14/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-15/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-16/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1700690"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}