HOMEVULNERABILITIESCVE-2018-16871
HIGH

CVE-2018-16871

CWE-476Published: July 30, 2019· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2018-16871 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Linux1 product(s)
linux kernel
netapp17 product(s)
cloud backuph410c firmwareh410ch300s firmwareh300sh500s firmwareh500sh700s firmwareh700sh300e firmwareh300eh500e firmware+5
Red Hat10 product(s)
developer toolsmrg realtimeenterprise linuxenterprise linux desktopenterprise linux eusenterprise linux serverenterprise linux server ausenterprise linux server eusenterprise linux server tusenterprise linux workstation
Source: NVD CPE · 30 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://access.redhat.com/errata/RHSA-2019:2696
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:2730
ADVISORYhttps://access.redhat.com/errata/RHSA-2020:0740
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16871
ADVISORYhttps://security.netapp.com/advisory/ntap-20211004-0002/
ADVISORYhttps://support.f5.com/csp/article/K18657134
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:2696
ADVISORYhttps://access.redhat.com/errata/RHSA-2019:2730
ADVISORYhttps://access.redhat.com/errata/RHSA-2020:0740
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16871
ADVISORYhttps://security.netapp.com/advisory/ntap-20211004-0002/
ADVISORYhttps://support.f5.com/csp/article/K18657134

All References (14)

→
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

Quick Facts

CVE IDCVE-2018-16871
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-476
CISA KEVNo
Affected3 vendor(s)
PublishedJul 30, 2019

Related CVEs (CWE-476)

CVE-2010-2495
10.0
CVE-2022-36648
10.0
CVE-2021-4236
9.8
CVE-2021-35068
9.8
CVE-2016-5689
9.8
CVE-2016-3821
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-16871 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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