CVE-2021-3543

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    CVE-2021-3543

    Published: 1 Jun 2021Last Modified: 14 Mar 2026

    Summary:

    Details: A flaw null pointer dereference in the Nitro Enclaves kernel driver was found in the way that Enclaves VMs forces closures on the enclave file descriptor. A local user of a host machine could use this flaw to crash the system or escalate their privileges on the system.

    References: https://lore.kernel.org/lkml/20210429165941.27020-2-andraprs%40amazon.com/, https://bugzilla.redhat.com/show_bug.cgi?id=1953022

    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-2021-3543 | CVE-DB