CVE-2020-29368

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    CVE-2020-29368

    Published: 28 Nov 2020Last Modified: 15 Mar 2026

    Summary:

    Details: An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1.

    References: https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.5, https://security.netapp.com/advisory/ntap-20210108-0002/, https://bugs.chromium.org/p/project-zero/issues/detail?id=2045, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c444eb564fb16645c172d550359cb3d75fe8a040

    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-2020-29368 | CVE-DB