UBUNTU-CVE-2026-53131

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    UBUNTU-CVE-2026-53131

    Published: 25 Jun 2026Last Modified: 18 Sept 2026
    Upstream:
    CVE-2026-53131
    Aliases:
    USN-8629-1
    USN-8629-2
    USN-8629-3

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() `ip6t_eui64`, `xt_mac`, the `bitmap:ip,mac`, `hash:ip,mac`, and `hash:mac` ipset types, and `nf_log_syslog` access `eth_hdr(skb)` after either assuming that the skb is associated with an Ethernet device or checking only that the `ETH_HLEN` bytes at `skb_mac_header(skb)` lie between `skb->head` and `skb->data`. Make these paths first verify that the skb is associated with an Ethernet device, that the MAC header was set, and that it spans at least a full Ethernet header before accessing `eth_hdr(skb)`.

    References: https://ubuntu.com/security/CVE-2026-53131, https://www.cve.org/CVERecord?id=CVE-2026-53131, https://git.kernel.org/linus/62443dc21114c0bbc476fa62973db89743f2f137, https://git.kernel.org/stable/c/063f43361e884acd7300790e90194430275d0d0c, https://git.kernel.org/stable/c/367abcacc13a8e2e7624408b7f593bd1e60e49d9, https://git.kernel.org/stable/c/4435888e1bf139d2bfe5911643d4217382136743, https://git.kernel.org/stable/c/5d634afb8b83b49de562792fd0d047416a43bd4d, https://git.kernel.org/stable/c/62443dc21114c0bbc476fa62973db89743f2f137, https://git.kernel.org/stable/c/726abf97566867f808fec9d8a408eb9698bd570a, https://git.kernel.org/stable/c/cea435ea7e868ea6fdf039bc4f2090c1d829b556, https://ubuntu.com/security/notices/USN-8629-1, https://ubuntu.com/security/notices/USN-8636-1, https://ubuntu.com/security/notices/USN-8637-1, https://ubuntu.com/security/notices/USN-8629-2, https://ubuntu.com/security/notices/USN-8629-3, https://ubuntu.com/security/notices/USN-8636-2, https://ubuntu.com/security/notices/USN-8660-1, https://ubuntu.com/security/notices/USN-8663-1, https://ubuntu.com/security/notices/USN-8664-1, https://ubuntu.com/security/notices/USN-8669-1, https://ubuntu.com/security/notices/USN-8728-1, https://ubuntu.com/security/notices/USN-8730-1, https://ubuntu.com/security/notices/USN-8730-2, https://ubuntu.com/security/notices/USN-8781-1, https://ubuntu.com/security/notices/USN-8730-3

    Affected packages

    Package

    Name: linux

    Purl: pkg:deb/ubuntu/linux?arch=source&distro=esm-infra-legacy%2Ftrusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    3.11.0-12.19

    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