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Fencer Vulns
high 7.8

CVE-2018-14678 json

An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x.

published 2018-07-28 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6572

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S does not properly maintain RBX, which allows local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain privileges.

Patch / fix

  • linux linux_kernel 4.14.61, 4.17.13
  • linux Debian 14, Debian 13, Debian 12 4.17.14-1

debian advisories DEBIAN-CVE-2018-14678

  • linux Ubuntu 18.04 LTS 4.15.0-47.50
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1035.37
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1029.31~16.04.1
  • linux-gcp Ubuntu 18.04 LTS 4.15.0-1029.31
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-47.50~16.04.1
  • linux-kvm Ubuntu 18.04 LTS 4.15.0-1031.31
  • linux-oem Ubuntu 18.04 LTS 4.15.0-1035.40
  • linux-azure Ubuntu 14.04 LTS 4.15.0-1041.45~14.04.1

ubuntu advisories UBUNTU-CVE-2018-14678

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-syms SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.121-92.95.1
  • kernel-source SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.121-92.95.1
  • lttng-modules SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 2.7.1-9.6.1
  • kernel-default SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +3 more 4.4.121-92.95.1
  • kgraft-patch-SLE12-SP2_Update_25 SLES for SAP 12 SP2, SLES 12 SP2-LTSS, OpenStack Cloud 7 +1 more 1-3.4.1

suse advisories SUSE-SU-2018:3084-1

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-2018-14678 updated cvss 7.0

xen: Uninitialized state in x86 PV failsafe callback path (XSA-274)

  • Red Hat Enterprise Linux 5 kernel, kernel-xen Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: no fix planned “Out of support scope”
  • 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

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/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.