CVE-2021-4128 Information

Description

When transitioning in and out of fullscreen mode a graphics object was not correctly protected; resulting in memory corruption and a potentially exploitable crash.
This bug only affects Firefox on MacOS. Other operating systems are unaffected.. This vulnerability affects Firefox < 95.

Reference

https://www.mozilla.org/security/advisories/mfsa2021-52/ https://bugzilla.mozilla.org/show_bug.cgi?id=1735852