{"id":"CVE-2019-9792","details":"The IonMonkey just-in-time (JIT) compiler can leak an internal JS_OPTIMIZED_OUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash. This vulnerability affects Thunderbird \u003c 60.6, Firefox ESR \u003c 60.6, and Firefox \u003c 66.","modified":"2026-03-15T22:32:11.906447Z","published":"2019-04-26T17:29:01.697Z","related":["MGASA-2019-0116","MGASA-2019-0129","SUSE-SU-2019:0852-1","SUSE-SU-2019:0853-1","SUSE-SU-2019:0871-1","openSUSE-SU-2019:1077-1","openSUSE-SU-2019:1126-1","openSUSE-SU-2019:1162-1","openSUSE-SU-2024:10600-1","openSUSE-SU-2024:14572-1"],"references":[{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2019-07/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2019-08/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2019-11/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0966"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:1144"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1532599"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/153106/Spidermonkey-IonMonkey-JS_OPTIMIZED_OUT-Value-Leak.html"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"60.6.0"}]},{"events":[{"introduced":"0"},{"fixed":"66.0"}]},{"events":[{"introduced":"0"},{"fixed":"60.6.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.1"}]},{"events":[{"introduced":"0"},{"last_affected":"8.2"}]},{"events":[{"introduced":"0"},{"last_affected":"8.4"}]},{"events":[{"introduced":"0"},{"last_affected":"8.2"}]},{"events":[{"introduced":"0"},{"last_affected":"8.4"}]},{"events":[{"introduced":"0"},{"last_affected":"8.2"}]},{"events":[{"introduced":"0"},{"last_affected":"8.4"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9792.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}