CVE-2021-46953

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    CVE-2021-46953

    Published: 27 Feb 2024Last Modified: 15 Mar 2026

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure When failing the driver probe because of invalid firmware properties, the GTDT driver unmaps the interrupt that it mapped earlier. However, it never checks whether the mapping of the interrupt actially succeeded. Even more, should the firmware report an illegal interrupt number that overlaps with the GIC SGI range, this can result in an IPI being unmapped, and subsequent fireworks (as reported by Dann Frazier). Rework the driver to have a slightly saner behaviour and actually check whether the interrupt has been mapped before unmapping things.

    References: https://git.kernel.org/stable/c/7b2162db1498c71962a4bb2f776fa4e76d4d305b, https://git.kernel.org/stable/c/c3385a9122f8db15b453e07bfc88117fce7f3724, https://git.kernel.org/stable/c/e0f2d86481eaa83df33b0793f75212919db7a19d, https://git.kernel.org/stable/c/1ecd5b129252249b9bc03d7645a7bda512747277, https://git.kernel.org/stable/c/42e69521ee1fa5abf21f478d147d06bbfe6bf6a8, https://git.kernel.org/stable/c/504632a3577a049dd9bb7aabae5b4476f9c586b4, https://git.kernel.org/stable/c/596e079c362ac17ed02aa1b99fdc444d62072a01

    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-2021-46953 | CVE-DB