CVE-2021-1884

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    CVE-2021-1884

    Published: 8 Sept 2021Last Modified: 10 Mar 2026

    Summary:

    Details: A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-004 Mojave, iOS 14.5 and iPadOS 14.5, watchOS 7.4, Security Update 2021-003 Catalina, tvOS 14.5, macOS Big Sur 11.3. A remote attacker may be able to cause a denial of service.

    References: , https://support.apple.com/en-us/HT212530, https://support.apple.com/en-us/HT212531, https://support.apple.com/en-us/HT212317, https://support.apple.com/en-us/HT212323, https://support.apple.com/en-us/HT212324, https://support.apple.com/en-us/HT212325

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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
    CVE-2021-1884 | CVE-DB