CVE-2019-19227

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    CVE-2019-19227

    Published: 22 Nov 2019Last Modified: 15 Mar 2026

    Summary:

    Details: In the AppleTalk subsystem in the Linux kernel before 5.1, there is a potential NULL pointer dereference because register_snap_client may return NULL. This will lead to denial of service in net/appletalk/aarp.c and net/appletalk/ddp.c, as demonstrated by unregister_snap_client, aka CID-9804501fa122.

    References: https://seclists.org/bugtraq/2020/Jan/10, https://usn.ubuntu.com/4287-1/, https://usn.ubuntu.com/4287-2/, http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html, https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html, https://usn.ubuntu.com/4254-1/, https://usn.ubuntu.com/4254-2/, https://usn.ubuntu.com/4258-1/, http://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html, https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html, https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1, https://security.netapp.com/advisory/ntap-20200103-0001/, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9804501fa1228048857910a6bf23e085aade37cc

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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
    CVE-2019-19227 | CVE-DB