medium
4.7
CWE
476
Advisory Published
CVE Published
Updated

CVE-2019-16231: Null Pointer Dereference

First published: Wed Sep 11 2019(Updated: )

A flaw was found in the Linux kernel. A NULL pointer dereference flaw was found in the FUJITSU Extended Socket Network driver. A call to the alloc_workqueue return was not validated and causes a denial of service at the time of failure. 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
Ubuntu Linux=19.10
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<=6.12.15-1
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=19.04
Ubuntu=19.10

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-2019-16231?

    CVE-2019-16231 has a high severity rating due to its potential to cause denial of service.

  • How do I fix CVE-2019-16231?

    To fix CVE-2019-16231, update to the recommended kernel versions provided by your distribution.

  • What systems are affected by CVE-2019-16231?

    CVE-2019-16231 affects various Linux kernel versions including those on Red Hat, Ubuntu, and openSUSE.

  • What exploit does CVE-2019-16231 present?

    CVE-2019-16231 presents an exploit that could lead to a NULL pointer dereference in the FUJITSU Extended Socket Network driver.

  • Is there a patch available for CVE-2019-16231?

    Yes, patches are available for CVE-2019-16231 in the form of updated kernel packages.

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