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Fencer Vulns
medium 5.5

CVE-2018-19407 json

The vcpu_scan_ioapic function in arch/x86/kvm/x86.c in the Linux kernel through 4.19.2 allows local users to cause a denial of service (NUL…

published 2018-11-21 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-11100

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

The vcpu_scan_ioapic function in arch/x86/kvm/x86.c in the Linux kernel through 4.19.2 allows local users to cause a denial of service (NULL pointer dereference and BUG) via crafted system calls that reach a situation where ioapic is uninitialized.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.19.9-1

debian advisories DEBIAN-CVE-2018-19407

  • linux Ubuntu 16.04 LTS 4.4.0-142.168
  • linux Ubuntu 18.04 LTS 4.15.0-44.47
  • linux-aws Ubuntu 14.04 LTS 4.4.0-1038.41
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1075.85
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1032.34
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1027.28~16.04.1
  • linux-gcp Ubuntu 18.04 LTS 4.15.0-1027.28
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-45.48~16.04.1

ubuntu advisories UBUNTU-CVE-2018-19407

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-ec2 SLE Module for Public Cloud 12 3.12.74-60.64.110.1
  • kernel-syms SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.121-92.109.2
  • kernel-source SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.121-92.109.2
  • kernel-default SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +3 more 4.4.121-92.109.2
  • kgraft-patch-SLE12-SP2_Update_29 SLES for SAP 12 SP2, SLES 12 SP2-LTSS, OpenStack Cloud 7 +1 more 1-3.5.2
  • ocfs2 SLE Real Time 11 SP4, SLE High Availability Extension 11 SP4 1.6-0.28.7.1
  • kernel-ec2 SLES for SAP 11 SP4, SLES 11 SP4 3.0.101-108.87.1
  • kernel-pae SLES for SAP 11 SP4, SLES 11 SP4 3.0.101-108.87.1

suse advisories SUSE-SU-2019:1289-1SUSE-SU-2019:1287-1SUSE-SU-2019:13979-1SUSE-SU-2019:0541-1SUSE-SU-2019:0320-1SUSE-SU-2019:0224-1

  • kernel-source openSUSE Leap 15.0 4.12.14-lp150.12.45.1

opensuse advisories openSUSE-SU-2019:0065-1

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-2018-19407 updated cvss 4.4

kernel: kvm: NULL pointer dereference in vcpu_scan_ioapic in arch/x86/kvm/x86.c

  • 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, bpftool, kernel-rt, kernel-alt, python-perf, +9 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    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

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
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

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.