CVE-2018-16871

Name: CVE-2018-16871
Creator: NVD / NIST
Published: 2019-07-30T17:15:12.187+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.78%

Last modified Jun 17, 2026

CVE-2018-16871 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A flaw was found in the Linux kernel's NFS implementation, all versions 3.x and all versions 4.x up to 4.20. An attacker, who is able to mount an exported NFS filesystem, is able to trigger a null pointer dereference by using an invalid NFS sequence. EPSS estimates a 2.78% chance of exploitation in the next 30 days.

Description

A flaw was found in the Linux kernel's NFS implementation, all versions 3.x and all versions 4.x up to 4.20. An attacker, who is able to mount an exported NFS filesystem, is able to trigger a null pointer dereference by using 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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.78%

84.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
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
Netapp	Cloud Backup	All versions
Netapp	H410c Firmware	All versions
Netapp	H300s Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H300e Firmware	All versions
Netapp	H500e Firmware	All versions
Netapp	H700e Firmware	All versions
Netapp	H410s Firmware	All versions

References

https://access.redhat.com/errata/RHSA-2019:2696Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2730Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0740Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16871Issue Tracking, Third Party Advisory
https://security.netapp.com/advisory/ntap-20211004-0002/Third Party Advisory
https://support.f5.com/csp/article/K18657134Third Party Advisory
https://support.f5.com/csp/article/K18657134?utm_source=f5support&amp%3Butm_medium=RSS
https://access.redhat.com/errata/RHSA-2019:2696Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2730Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0740Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16871Issue Tracking, Third Party Advisory
https://security.netapp.com/advisory/ntap-20211004-0002/Third Party Advisory
https://support.f5.com/csp/article/K18657134Third Party Advisory
https://support.f5.com/csp/article/K18657134?utm_source=f5support&amp%3Butm_medium=RSS

Timeline

Published: Jul 30, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-16871?

How severe is CVE-2018-16871?

CVE-2018-16871 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.78% probability of exploitation in the next 30 days.

How do I fix CVE-2018-16871?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-16871?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST