CVE-2021-46966

    Dashboard / Vulnerabilities / CVE-2021-46966

    CVE-2021-46966

    Published: 27 Feb 2024Last Modified: 15 Mar 2026

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: ACPI: custom_method: fix potential use-after-free issue In cm_write(), buf is always freed when reaching the end of the function. If the requested count is less than table.length, the allocated buffer will be freed but subsequent calls to cm_write() will still try to access it. Remove the unconditional kfree(buf) at the end of the function and set the buf to NULL in the -EINVAL error path to match the rest of function.

    References: https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394, https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b, https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17, https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234, https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b, https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203, https://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be, https://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23, https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa

    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-2021-46966 | CVE-DB