UBUNTU-CVE-2023-3439

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    UBUNTU-CVE-2023-3439

    Published: 28 Jun 2023Last Modified: 9 Sept 2026
    Upstream:
    CVE-2023-3439

    Summary:

    Details: A flaw was found in the MCTP protocol in the Linux kernel. The function mctp_unregister() reclaims the device's relevant resource when a netcard detaches. However, a running routine may be unaware of this and cause the use-after-free of the mdev->addrs object, potentially leading to a denial of service.

    References: https://ubuntu.com/security/CVE-2023-3439, https://git.kernel.org/linus/b561275d633bcd8e0e8055ab86f1a13df75a0269, https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269, https://www.openwall.com/lists/oss-security/2023/07/02/1, https://ubuntu.com/security/notices/USN-6246-1, https://ubuntu.com/security/notices/USN-6255-1, https://www.cve.org/CVERecord?id=CVE-2023-3439

    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-2023-3439 | CVE-DB