CVE-2020-29374

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    CVE-2020-29374

    Published: 28 Nov 2020Last Modified: 15 Mar 2026

    Summary:

    Details: An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.

    References: https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html, https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.3, https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html, https://security.netapp.com/advisory/ntap-20210115-0002/, https://www.debian.org/security/2022/dsa-5096, https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html, 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=17839856fd588f4ab6b789f482ed3ffd7c403e1f, http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html

    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-2020-29374 | CVE-DB