medium
4.7
CWE
476
Advisory Published
CVE Published
Updated

CVE-2019-16233: Null Pointer Dereference

First published: Mon Sep 09 2019(Updated: )

A flaw was found in the Linux kernel. A NULL pointer dereference flaw was found in the QLOGIC drivers for HBA. A call to alloc_workqueue return was not validated and can cause a denial of service. The highest threat from this vulnerability is to system availability.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:3.10.0-1160.rt56.1131.el7
0:3.10.0-1160.rt56.1131.el7
redhat/kernel<0:3.10.0-1160.el7
0:3.10.0-1160.el7
redhat/kernel-rt<0:4.18.0-240.rt7.54.el8
0:4.18.0-240.rt7.54.el8
redhat/kernel<0:4.18.0-240.el8
0:4.18.0-240.el8
Linux Kernel=5.2.14
Ubuntu Linux=14.04
Ubuntu Linux=16.04
Ubuntu Linux=18.04
Ubuntu Linux=19.04
openSUSE=15.0
openSUSE=15.1
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux=8.0
debian/linux<=5.10.223-1<=5.10.226-1<=6.1.123-1<=6.1.128-1<=6.12.12-1<=6.12.16-1
Linux kernel=5.2.14
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=19.04

Remedy

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Remedy

https://lkml.org/lkml/2019/9/9/487

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2019-16233?

    The severity of CVE-2019-16233 is critical, primarily affecting system availability due to a NULL pointer dereference.

  • How do I fix CVE-2019-16233?

    To fix CVE-2019-16233, update to the fixed kernel versions provided by your distribution such as Red Hat Enterprise Linux or Ubuntu.

  • Which versions are affected by CVE-2019-16233?

    CVE-2019-16233 affects multiple versions of the Linux kernel, specifically those before the patched versions indicated by your distribution.

  • What type of vulnerability is CVE-2019-16233?

    CVE-2019-16233 is a NULL pointer dereference vulnerability found in the QLOGIC drivers.

  • What systems are impacted by CVE-2019-16233?

    CVE-2019-16233 impacts systems running vulnerable versions of the Linux kernel across various distributions like Red Hat and Ubuntu.

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