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    CVE-2021-4128

    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.

    Published:Dec 22, 2022
    Last Modified:Apr 16, 2025
    EPS:Dec 22, 2022
    EPSS Score:0.00216
    CVSS Score:6.5

    Affected Products

    Vendor
    Apple
    Product
    Macos
    Vendor
    Mozilla
    Product
    Firefox

    Exploits

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

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High