UBUNTU-CVE-2023-31248

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    UBUNTU-CVE-2023-31248

    Published: 5 Jul 2023Last Modified: 9 Sept 2026
    Upstream:
    CVE-2023-31248
    Aliases:
    USN-6246-1
    USN-6247-1
    USN-6248-1

    Summary:

    Details: Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace

    References: https://ubuntu.com/security/CVE-2023-31248, https://lore.kernel.org/netfilter-devel/[email protected]/T/, https://www.openwall.com/lists/oss-security/2023/07/05/2, https://www.zerodayinitiative.com/advisories/ZDI-23-899/, https://ubuntu.com/security/notices/USN-6246-1, https://ubuntu.com/security/notices/USN-6247-1, https://ubuntu.com/security/notices/USN-6248-1, https://ubuntu.com/security/notices/USN-6250-1, https://ubuntu.com/security/notices/USN-6255-1, https://ubuntu.com/security/notices/USN-6260-1, https://ubuntu.com/security/notices/USN-6285-1, https://www.cve.org/CVERecord?id=CVE-2023-31248

    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-2023-31248 | CVE-DB