CVE-2021-46973

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    CVE-2021-46973

    Published: 27 Feb 2024Last Modified: 15 Mar 2026

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: net: qrtr: Avoid potential use after free in MHI send It is possible that the MHI ul_callback will be invoked immediately following the queueing of the skb for transmission, leading to the callback decrementing the refcount of the associated sk and freeing the skb. As such the dereference of skb and the increment of the sk refcount must happen before the skb is queued, to avoid the skb to be used after free and potentially the sk to drop its last refcount..

    References: https://git.kernel.org/stable/c/03c649dee8b1eb5600212a249542a70f47a5ab40, https://git.kernel.org/stable/c/47a017f33943278570c072bc71681809b2567b3a, https://git.kernel.org/stable/c/48ec949ac979b4b42d740f67b6177797af834f80, https://git.kernel.org/stable/c/ea474054c2cc6e1284604b21361f475c7cc8c0a0

    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-2021-46973 | CVE-DB