UBUNTU-CVE-2023-3609

    Dashboard / Vulnerabilities / UBUNTU-CVE-2023-3609

    UBUNTU-CVE-2023-3609

    Published: 21 Jul 2023Last Modified: 9 Sept 2026
    Upstream:
    CVE-2023-3609
    Aliases:
    USN-6285-1
    USN-6315-1
    USN-6317-1

    Summary:

    Details: A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.

    References: https://ubuntu.com/security/CVE-2023-3609, https://security.googleblog.com/2023/06/learnings-from-kctf-vrps-42-linux.html, https://ubuntu.com/security/notices/USN-6285-1, https://ubuntu.com/security/notices/USN-6315-1, https://ubuntu.com/security/notices/USN-6317-1, https://ubuntu.com/security/notices/USN-6318-1, https://ubuntu.com/security/notices/USN-6321-1, https://ubuntu.com/security/notices/USN-6324-1, https://ubuntu.com/security/notices/USN-6325-1, https://ubuntu.com/security/notices/USN-6328-1, https://ubuntu.com/security/notices/USN-6329-1, https://ubuntu.com/security/notices/USN-6330-1, https://ubuntu.com/security/notices/USN-6331-1, https://ubuntu.com/security/notices/USN-6332-1, https://ubuntu.com/security/notices/USN-6346-1, https://ubuntu.com/security/notices/USN-6348-1, https://ubuntu.com/security/notices/USN-6357-1, https://ubuntu.com/security/notices/USN-6385-1, https://ubuntu.com/security/notices/USN-6397-1, https://www.cve.org/CVERecord?id=CVE-2023-3609

    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-2023-3609 | CVE-DB