UBUNTU-CVE-2023-0468

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    UBUNTU-CVE-2023-0468

    Published: 26 Jan 2023Last Modified: 22 Apr 2026
    Upstream:
    CVE-2023-0468
    Aliases:
    USN-5912-1
    USN-5935-1
    USN-5938-1

    Summary:

    Details: A use-after-free flaw was found in io_uring/poll.c in io_poll_check_events in the io_uring subcomponent in the Linux Kernel due to a race condition of poll_refs. This flaw may cause a NULL pointer dereference.

    References: https://ubuntu.com/security/CVE-2023-0468, https://git.kernel.org/linus/12ad3d2d6c5b0131a6052de91360849e3e154846, https://git.kernel.org/linus/a26a35e9019fd70bf3cf647dcfdae87abc7bacea, https://ubuntu.com/security/notices/USN-5912-1, https://ubuntu.com/security/notices/USN-5935-1, https://ubuntu.com/security/notices/USN-5938-1, https://ubuntu.com/security/notices/USN-5941-1, https://ubuntu.com/security/notices/USN-5962-1, https://ubuntu.com/security/notices/USN-6024-1, https://ubuntu.com/security/notices/USN-6071-1, https://ubuntu.com/security/notices/USN-6072-1, https://www.cve.org/CVERecord?id=CVE-2023-0468

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/[email protected]~16.04.1?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-2023-0468 | CVE-DB