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Fencer Vulns
medium 5.5

CVE-2018-14646 json

The Linux kernel before 4.15-rc8 was found to be vulnerable to a NULL pointer dereference bug in the __netlink_ns_capable() function in the…

published 2018-11-26 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6544

cvss
5.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits
0
none known

Summary

The Linux kernel before 4.15-rc8 was found to be vulnerable to a NULL pointer dereference bug in the __netlink_ns_capable() function in the net/netlink/af_netlink.c file. A local attacker could exploit this when a net namespace with a netnsid is assigned to cause a kernel panic and a denial of service.

Patch / fix

  • kernel-rt RHEL 7 EXTRAS_RT 3.10.0-957.1.3.rt56.913.el7
  • kernel-rt-kvm RHEL 7 EXTRAS_RT 3.10.0-957.1.3.rt56.913.el7
  • kernel-rt-trace RHEL 7 EXTRAS_RT 3.10.0-957.1.3.rt56.913.el7
  • kernel-rt-debug-kvm RHEL 7 EXTRAS_RT 3.10.0-957.1.3.rt56.913.el7
  • kernel-rt-trace-kvm RHEL 7 EXTRAS_RT 3.10.0-957.1.3.rt56.913.el7
  • kernel-rt-debuginfo-common-x86_64 RHEL 7 EXTRAS_RT 3.10.0-957.1.3.rt56.913.el7
  • kernel RHEL 7 3.10.0-957.1.3.el7
  • perf RHEL 7 3.10.0-957.1.3.el7

red hat advisories RHSA-2018:3666RHSA-2018:3651RHSA-2018:3843

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-14646 updated cvss 5.5

kernel: NULL pointer dereference in af_netlink.c:__netlink_ns_capable() allows for denial of service

  • Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    affected: no fix available
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-957.1.3.el7, kernel 3.10.0-957.1.3.el7, bpftool 3.10.0-957.1.3.el7, python-perf 3.10.0-957.1.3.el7, kernel-tools 3.10.0-957.1.3.el7, kernel-tools-libs 3.10.0-957.1.3.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-957.1.3.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-957.1.3.el7, kernel 3.10.0-957.1.3.el7, bpftool 3.10.0-957.1.3.el7, python-perf 3.10.0-957.1.3.el7, kernel-tools 3.10.0-957.1.3.el7, kernel-tools-libs 3.10.0-957.1.3.el7, +2 more
    fixed: vendor fix RHSA-2018:3651
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.5) perf 3.10.0-862.25.3.el7, kernel 3.10.0-862.25.3.el7, python-perf 3.10.0-862.25.3.el7, kernel-tools 3.10.0-862.25.3.el7, kernel-tools-libs 3.10.0-862.25.3.el7, kernel-abi-whitelists 3.10.0-862.25.3.el7, +1 more
    fixed: vendor fix RHSA-2018:3843
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-957.1.3.el7
    fixed: vendor fix RHSA-2018:3651
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) kernel-debuginfo-common-x86_64 3.10.0-862.25.3.el7
    fixed: vendor fix RHSA-2018:3843
  • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-957.1.3.rt56.913.el7, kernel-rt-kvm 3.10.0-957.1.3.rt56.913.el7, kernel-rt-trace 3.10.0-957.1.3.rt56.913.el7, kernel-rt-debug-kvm 3.10.0-957.1.3.rt56.913.el7, kernel-rt-trace-kvm 3.10.0-957.1.3.rt56.913.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-957.1.3.rt56.913.el7 Red Hat Enterprise Linux Realtime (v. 7) kernel-rt 3.10.0-957.1.3.rt56.913.el7, kernel-rt-trace 3.10.0-957.1.3.rt56.913.el7
    fixed: vendor fix RHSA-2018:3666
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-957.1.3.el7, kernel 3.10.0-957.1.3.el7, bpftool 3.10.0-957.1.3.el7, python-perf 3.10.0-957.1.3.el7, kernel-kdump 3.10.0-957.1.3.el7, kernel-tools 3.10.0-957.1.3.el7, +7 more
    fixed: vendor fix RHSA-2018:3651
  • Red Hat Enterprise Linux Server EUS (v. 7.5) perf 3.10.0-862.25.3.el7, kernel 3.10.0-862.25.3.el7, python-perf 3.10.0-862.25.3.el7, kernel-kdump 3.10.0-862.25.3.el7, kernel-tools 3.10.0-862.25.3.el7, kernel-tools-libs 3.10.0-862.25.3.el7, +6 more
    fixed: vendor fix RHSA-2018:3843
show 4 more
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-957.1.3.el7, kernel-debuginfo-common-x86_64 3.10.0-957.1.3.el7, kernel-debuginfo-common-ppc64le 3.10.0-957.1.3.el7
    fixed: vendor fix RHSA-2018:3651
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.5) kernel-debuginfo-common-ppc64 3.10.0-862.25.3.el7, kernel-debuginfo-common-x86_64 3.10.0-862.25.3.el7, kernel-debuginfo-common-ppc64le 3.10.0-862.25.3.el7
    fixed: vendor fix RHSA-2018:3843
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-957.1.3.el7, kernel 3.10.0-957.1.3.el7, bpftool 3.10.0-957.1.3.el7, python-perf 3.10.0-957.1.3.el7, kernel-tools 3.10.0-957.1.3.el7, kernel-tools-libs 3.10.0-957.1.3.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-957.1.3.el7
    fixed: vendor fix RHSA-2018:3651
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, kernel-alt, python-perf, kernel-kdump, kernel-tools, +3 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Affected products

  • [UNKNOWN] kernel:

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.