high
7.5
CWE
476
Advisory Published
CVE Published
CVE Published
Updated

CVE-2018-16871: Null Pointer Dereference

First published: Fri Nov 30 2018(Updated: )

A flaw was found in NFS in the Linux Kernel. An attacker who is able to mount an exported NFS filesystem is able to trigger a null pointer dereference by an invalid NFS sequence. This can panic the machine and deny access to the NFS server. Any outstanding disk writes to the NFS server will be lost. Upstream fix: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=01310bb7c9c98752cc763b36532fab028e0f8f81">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=01310bb7c9c98752cc763b36532fab028e0f8f81</a>

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:3.10.0-957.27.2.rt56.940.el7
0:3.10.0-957.27.2.rt56.940.el7
redhat/kernel<0:3.10.0-957.27.2.el7
0:3.10.0-957.27.2.el7
redhat/kernel-alt<0:4.14.0-115.18.1.el7a
0:4.14.0-115.18.1.el7a
redhat/kernel<0:3.10.0-693.58.1.el7
0:3.10.0-693.58.1.el7
redhat/kernel-rt<0:4.18.0-193.rt13.51.el8
0:4.18.0-193.rt13.51.el8
redhat/kernel<0:4.18.0-193.el8
0:4.18.0-193.el8
redhat/kernel-rt<1:3.10.0-693.58.1.rt56.652.el6
1:3.10.0-693.58.1.rt56.652.el6
Linux Linux kernel>=3.0<=4.20
Redhat Developer Tools=1.0
Redhat Mrg Realtime=2.0
Redhat Enterprise Linux=7.0
Redhat Enterprise Linux Desktop=7.0
Redhat Enterprise Linux Eus=7.4
Redhat Enterprise Linux Server=7.0
Redhat Enterprise Linux Server Aus=7.4
Redhat Enterprise Linux Server Aus=7.6
Redhat Enterprise Linux Server Eus=7.6
Redhat Enterprise Linux Server Tus=7.4
Redhat Enterprise Linux Server Tus=7.6
Redhat Enterprise Linux Workstation=7.0
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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2018-16871?

    CVE-2018-16871 is a vulnerability in the Linux kernel's NFS implementation that allows an attacker to trigger a null pointer dereference, potentially causing the system to panic and deny access.

  • How does CVE-2018-16871 affect the Linux kernel?

    CVE-2018-16871 affects all versions 3.x and all versions 4.x up to 4.20 of the Linux kernel.

  • What is the severity of CVE-2018-16871?

    CVE-2018-16871 has a severity rating of high and a score of 7.

  • Which software versions are affected by CVE-2018-16871?

    The affected software versions are: kernel-rt 3.10.0-957.27.2.rt56.940.el7, kernel 3.10.0-957.27.2.el7, kernel-alt 4.14.0-115.18.1.el7a, kernel 3.10.0-693.58.1.el7, kernel-rt 4.18.0-193.rt13.51.el8, kernel 4.18.0-193.el8, and kernel-rt 3.10.0-693.58.1.rt56.652.el6.

  • How can CVE-2018-16871 be fixed?

    To fix CVE-2018-16871, it is recommended to update the Linux kernel to a version that includes the necessary patches.

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