UBUNTU-CVE-2023-21400

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    UBUNTU-CVE-2023-21400

    Published: 13 Jul 2023Last Modified: 9 Sept 2026
    Upstream:
    CVE-2023-21400
    Aliases:
    USN-6315-1
    USN-6325-1
    USN-6330-1

    Summary:

    Details: In multiple functions of io_uring.c, there is a possible kernel memory corruption due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.

    References: https://ubuntu.com/security/CVE-2023-21400, https://source.android.com/security/bulletin/pixel/2023-07-01, https://yanglingxi1993.github.io/dirty_pagetable/dirty_pagetable.html, https://www.openwall.com/lists/oss-security/2023/07/14/2, https://www.openwall.com/lists/oss-security/2023/07/25/9, https://twitter.com/VAR10CK/status/1683303642173153280, https://ubuntu.com/security/notices/USN-6315-1, https://ubuntu.com/security/notices/USN-6325-1, https://ubuntu.com/security/notices/USN-6330-1, https://ubuntu.com/security/notices/USN-6332-1, https://ubuntu.com/security/notices/USN-6348-1, https://www.cve.org/CVERecord?id=CVE-2023-21400, https://ubuntu.com/security/notices/USN-7234-1, https://ubuntu.com/security/notices/USN-7234-2, https://ubuntu.com/security/notices/USN-7234-3, https://ubuntu.com/security/notices/USN-7234-4, https://ubuntu.com/security/notices/USN-7295-1, https://ubuntu.com/security/notices/USN-7234-5, https://ubuntu.com/security/notices/USN-7413-1

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/linux-hwe-edge?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.8.0-28.30~16.04.1
    4.8.0-30.32~16.04.1
    4.8.0-32.34~16.04.1
    4.8.0-34.36~16.04.1

    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
    UBUNTU-CVE-2023-21400 | CVE-DB