CVE-2021-4128

medium

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.<br>*This bug only affects Firefox on MacOS. Other operating systems are unaffected.*. This vulnerability affects Firefox < 95.

References

https://www.mozilla.org/security/advisories/mfsa2021-52/

https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-34002

https://bugzilla.mozilla.org/show_bug.cgi?id=1735852

Details

Source: Mitre, NVD

Published: 2022-12-22

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Severity: Medium

EPSS

EPSS: 0.00554