CVE-2021-4128

MediumCVSS 6.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-416

Affected software

Vendor	Product	Versions
Mozilla	Firefox	>= unspecified, < 95

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1735852Exploit, Issue Tracking, Patch, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-52/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1735852Exploit, Issue Tracking, Patch, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-52/Vendor Advisory

Timeline

Published: Dec 22, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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