Zitat von MITs Forum am 2. Juni 2023, 0:00 Uhr

When importing a SPKI RSA public key as ECDSA P-256, the key would be handled incorrectly causing the tab to crash. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.

References
https://bugzilla.mozilla.org/show_bug.cgi?id=1813424
https://www.mozilla.org/security/advisories/mfsa2023-05/
https://www.mozilla.org/security/advisories/mfsa2023-06/
https://www.mozilla.org/security/advisories/mfsa2023-07/