UBUNTU-CVE-2023-2235

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    UBUNTU-CVE-2023-2235

    Published: 1 May 2023Last Modified: 9 Sept 2026
    Upstream:
    CVE-2023-2235
    Aliases:
    USN-6175-1
    USN-6186-1
    USN-6300-1

    Summary:

    Details: A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation. The perf_group_detach function did not check the event's siblings' attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability. We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.

    References: https://ubuntu.com/security/CVE-2023-2235, https://git.kernel.org/linus/fd0815f632c24878e325821943edccc7fde947a2, https://kernel.dance/fd0815f632c24878e325821943edccc7fde947a2, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd0815f632c24878e325821943edccc7fde947a2, https://ubuntu.com/security/notices/USN-6175-1, https://ubuntu.com/security/notices/USN-6186-1, https://ubuntu.com/security/notices/USN-6300-1, https://ubuntu.com/security/notices/USN-6311-1, https://ubuntu.com/security/notices/USN-6332-1, https://ubuntu.com/security/notices/USN-6347-1, https://ubuntu.com/security/notices/USN-6385-1, https://www.cve.org/CVERecord?id=CVE-2023-2235

    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-2023-2235 | CVE-DB