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CVE-2023-6863

CVE-2023-6863

EPSS 1.0%
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 < 115.6, Thunderbird < 115.6, and Firefox < 121.
Affected products
Mozilla · FirefoxMozilla · Firefox ESRMozilla · Thunderbird

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References
https://bugzilla.mozilla.org/show_bug.cgi?id=1868901https://lists.debian.org/debian-lts-announce/2023/12/msg00020.htmlhttps://security.gentoo.org/glsa/202401-10https://www.debian.org/security/2023/dsa-5581https://www.mozilla.org/security/advisories/mfsa2023-54/https://www.mozilla.org/security/advisories/mfsa2023-55/https://www.mozilla.org/security/advisories/mfsa2023-56/