{"id":"DEBIAN-CVE-2023-6863","details":"The `ShutdownObserver()` was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor. This vulnerability affects Firefox ESR \u003c 115.6, Thunderbird \u003c 115.6, and Firefox \u003c 121.","modified":"2026-09-15T09:02:54.002144729Z","published":"2023-12-19T14:15:07.650Z","upstream":["CVE-2023-6863"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-6863"}],"affected":[{"package":{"name":"firefox-esr","ecosystem":"Debian:12","purl":"pkg:deb/debian/firefox-esr?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"115.6.0esr-1~deb12u1"}]}],"versions":["102.11.0esr-1","102.12.0esr-1","102.12.0esr-1~deb10u1","102.12.0esr-1~deb11u1","102.12.0esr-1~deb12u1","102.13.0esr-1","102.13.0esr-1~deb10u1","102.13.0esr-1~deb11u1","102.13.0esr-1~deb12u1","102.14.0esr-1~deb10u1","102.14.0esr-1~deb11u1","102.14.0esr-1~deb12u1","102.15.0esr-1~deb10u1","102.15.0esr-1~deb11u1","102.15.0esr-1~deb12u1","102.15.1esr-1~deb10u1","102.15.1esr-1~deb11u1","102.15.1esr-1~deb12u1","115.0.2esr-1","115.1.0esr-1","115.2.0esr-1","115.2.1esr-1","115.3.0esr-1","115.3.0esr-1~deb10u1","115.3.0esr-1~deb11u1","115.3.0esr-1~deb12u1","115.3.1esr-1~deb10u1","115.3.1esr-1~deb11u1","115.4.0esr-1","115.4.0esr-1~deb10u1","115.4.0esr-1~deb11u1","115.4.0esr-1~deb12u1","115.5.0esr-1","115.5.0esr-1~deb10u1","115.5.0esr-1~deb11u1","115.5.0esr-1~deb12u1","115.6.0esr-1~deb10u1","115.6.0esr-1~deb11u1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-6863.json"}},{"package":{"name":"firefox-esr","ecosystem":"Debian:13","purl":"pkg:deb/debian/firefox-esr?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"115.6.0esr-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-6863.json"}},{"package":{"name":"firefox-esr","ecosystem":"Debian:14","purl":"pkg:deb/debian/firefox-esr?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"115.6.0esr-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-6863.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}