UBUNTU-CVE-2023-4015

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    UBUNTU-CVE-2023-4015

    Published: 3 Aug 2023Last Modified: 9 Sept 2026
    Upstream:
    CVE-2023-4015
    Aliases:
    USN-6315-1
    USN-6316-1
    USN-6318-1

    Summary:

    Details: A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used. We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.

    References: https://ubuntu.com/security/CVE-2023-4015, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2, https://google.github.io/security-research/kernelctf/rules, https://patchwork.ozlabs.org/project/netfilter-devel/patch/[email protected]/, https://ubuntu.com/security/notices/USN-6315-1, https://ubuntu.com/security/notices/USN-6316-1, https://ubuntu.com/security/notices/USN-6318-1, https://ubuntu.com/security/notices/USN-6321-1, https://ubuntu.com/security/notices/USN-6325-1, https://ubuntu.com/security/notices/USN-6328-1, 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://ubuntu.com/security/notices/USN-6385-1, https://www.cve.org/CVERecord?id=CVE-2023-4015

    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-2023-4015 | CVE-DB