UBUNTU-CVE-2025-22103

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    UBUNTU-CVE-2025-22103

    Published: 16 Apr 2025Last Modified: 8 Oct 2026
    Upstream:
    CVE-2025-22103
    Aliases:
    USN-7594-1
    USN-7594-2
    USN-7594-3

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: net: fix NULL pointer dereference in l3mdev_l3_rcv When delete l3s ipvlan: ip link del link eth0 ipvlan1 type ipvlan mode l3s This may cause a null pointer dereference: Call trace: ip_rcv_finish+0x48/0xd0 ip_rcv+0x5c/0x100 __netif_receive_skb_one_core+0x64/0xb0 __netif_receive_skb+0x20/0x80 process_backlog+0xb4/0x204 napi_poll+0xe8/0x294 net_rx_action+0xd8/0x22c __do_softirq+0x12c/0x354 This is because l3mdev_l3_rcv() visit dev->l3mdev_ops after ipvlan_l3s_unregister() assign the dev->l3mdev_ops to NULL. The process like this: (CPU1) | (CPU2) l3mdev_l3_rcv() | check dev->priv_flags: | master = skb->dev; | | | ipvlan_l3s_unregister() | set dev->priv_flags | dev->l3mdev_ops = NULL; | visit master->l3mdev_ops | To avoid this by do not set dev->l3mdev_ops when unregister l3s ipvlan.

    References: https://ubuntu.com/security/CVE-2025-22103, https://www.cve.org/CVERecord?id=CVE-2025-22103, https://git.kernel.org/linus/0032c99e83b9ce6d5995d65900aa4b6ffb501cce, https://git.kernel.org/stable/c/0032c99e83b9ce6d5995d65900aa4b6ffb501cce, https://git.kernel.org/stable/c/f9dff65140efc289f01bcf39c3ca66a8806b6132, https://ubuntu.com/security/notices/USN-7594-1, https://ubuntu.com/security/notices/USN-7594-2, https://ubuntu.com/security/notices/USN-7594-3, https://ubuntu.com/security/notices/USN-8095-1, https://ubuntu.com/security/notices/USN-8100-1, https://ubuntu.com/security/notices/USN-8095-2, https://ubuntu.com/security/notices/USN-8095-3, https://ubuntu.com/security/notices/USN-8095-4, https://ubuntu.com/security/notices/USN-8125-1, https://ubuntu.com/security/notices/USN-8126-1, https://ubuntu.com/security/notices/USN-8095-5, https://ubuntu.com/security/notices/USN-8165-1, https://ubuntu.com/security/notices/USN-8261-1

    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-2025-22103 | CVE-DB