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Fencer Intel
medium 6.5

CVE-2018-1066 json

The Linux kernel before version 4.11 is vulnerable to a NULL pointer dereference in fs/cifs/cifsencrypt.c:setup_ntlmv2_rsp() that allows an…

published 8y ago modified 4mo ago also EUVD-2018-11719

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

The Linux kernel before version 4.11 is vulnerable to a NULL pointer dereference in fs/cifs/cifsencrypt.c:setup_ntlmv2_rsp() that allows an attacker controlling a CIFS server to kernel panic a client that has this server mounted, because an empty TargetInfo field in an NTLMSSP setup negotiation response is mishandled during session recovery.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.11.6-1

debian advisories DEBIAN-CVE-2018-1066

  • linux Ubuntu 14.04 LTS 3.13.0-165.215
  • linux Ubuntu 16.04 LTS 4.4.0-87.110
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1026.35
  • linux-gke Ubuntu 16.04 LTS 4.4.0-1022.22
  • linux-hwe Ubuntu 16.04 LTS 4.8.0-56.61~16.04.1
  • linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1065.73
  • linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-87.110~14.04.1
  • linux-snapdragon Ubuntu 16.04 LTS 4.4.0-1067.72

ubuntu advisories UBUNTU-CVE-2018-1066

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 7 3.10.0-862.el7
  • perf RHEL 7 3.10.0-862.el7
  • python-perf RHEL 7 3.10.0-862.el7
  • kernel-kdump RHEL 7 3.10.0-862.el7
  • kernel-tools RHEL 7 3.10.0-862.el7
  • kernel-tools-libs RHEL 7 3.10.0-862.el7
  • kernel-bootwrapper RHEL 7 3.10.0-862.el7
  • kernel-abi-whitelists RHEL 7 3.10.0-862.el7

red hat advisories RHSA-2018:1062

  • kernel-ec2 SLE Module for Public Cloud 12 3.12.74-60.64.85.1
  • kernel-xen SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 3.12.74-60.64.85.1
  • kernel-syms SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 3.12.74-60.64.85.1
  • kernel-source SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 3.12.74-60.64.85.1
  • kernel-default SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 3.12.74-60.64.85.1
  • kgraft-patch-SLE12-SP1_Update_26 SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 1-2.3.1
  • kernel-ec2 SLE Module for Public Cloud 12 3.12.61-52.125.1
  • kernel-xen SLES 12-LTSS 3.12.61-52.125.1

suse advisories SUSE-SU-2018:0848-1SUSE-SU-2018:0834-1

Is CVE-2018-1066 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2018-1066 updated cvss 6.5

kernel: Null pointer dereference in fs/cifs/cifsencrypt.c:setup_ntlmv2_rsp() when empty TargetInfo is returned in NTLMSSP setup negotiation response allowing to crash client's kernel

  • Red Hat Enterprise Linux 7 kernel-rt, kernel-rt-kvm, kernel-rt-trace, kernel-rt-debug-kvm, kernel-rt-trace-kvm
    affected: no fix available
  • Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, kernel-abi-whitelists 3.10.0-862.el7, +1 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, kernel-abi-whitelists 3.10.0-862.el7, +1 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.el7 Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-kdump 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, +6 more Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-862.el7, kernel-debuginfo-common-x86_64 3.10.0-862.el7, kernel-debuginfo-common-ppc64le 3.10.0-862.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, kernel-abi-whitelists 3.10.0-862.el7, +1 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.el7
    fixed: vendor fix RHSA-2018:1062
  • 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-core, kernel-tools, python3-perf, +17 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

3.44% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C

Affected products

  • n/a Linux kernel 4.11

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel 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.