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Fencer Intel
high 7.5

CVE-2018-5748 json

qemu/qemu_monitor.c in libvirt allows attackers to cause a denial of service (memory consumption) via a large QEMU reply.

published 2018-01-25 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-17517

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.2%
EPSS 3.2% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

qemu/qemu_monitor.c in libvirt allows attackers to cause a denial of service (memory consumption) via a large QEMU reply.

Patch / fix

  • libvirt Debian 14, Debian 13, Debian 12 4.0.0-1

debian advisories DEBIAN-CVE-2018-5748

  • libvirt Ubuntu 14.04 LTS 1.2.2-0ubuntu13.1.26
  • libvirt Ubuntu 16.04 LTS 1.3.1-1ubuntu10.19

ubuntu advisories UBUNTU-CVE-2018-5748

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

  • libvirt RHEL 7 3.9.0-14.el7_5.4
  • libvirt-nss RHEL 7 3.9.0-14.el7_5.4
  • libvirt-libs RHEL 7 3.9.0-14.el7_5.4
  • libvirt-admin RHEL 7 3.9.0-14.el7_5.4
  • libvirt-client RHEL 7 3.9.0-14.el7_5.4
  • libvirt-daemon RHEL 7 3.9.0-14.el7_5.4
  • libvirt-daemon-kvm RHEL 7 3.9.0-14.el7_5.4
  • libvirt-daemon-lxc RHEL 7 3.9.0-14.el7_5.4

red hat advisories RHSA-2018:1396RHSA-2018:1929

  • libvirt SLES 11 SP3-TERADATA, SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 1.0.5.9-21.5.1
  • libvirt SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 1.2.5-23.6.1
  • libvirt SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +3 more 2.0.0-27.29.1
  • libvirt SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 +1 more 3.3.0-5.13.1
  • libvirt SLES 12-LTSS 1.2.5-27.13.1
  • libvirt SLES for SAP 12 SP1, SLES 12 SP1-LTSS 1.2.18.4-22.3.1

suse advisories SUSE-SU-2018:2141-1SUSE-SU-2018:2082-1SUSE-SU-2018:1295-1SUSE-SU-2018:0838-1SUSE-SU-2018:0385-1SUSE-SU-2018:0279-1

  • libvirt openSUSE Tumbleweed 7.7.0-2.1

opensuse advisories openSUSE-SU-2024:11008-1

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-2018-5748 updated cvss 3.3

libvirt: Resource exhaustion via qemuMonitorIORead() method

  • Red Hat Enterprise Linux Client (v. 7) libvirt 3.9.0-14.el7_5.4, libvirt-libs 3.9.0-14.el7_5.4, libvirt-client 3.9.0-14.el7_5.4, libvirt-daemon 3.9.0-14.el7_5.4, libvirt-daemon-kvm 3.9.0-14.el7_5.4, libvirt-daemon-driver-lxc 3.9.0-14.el7_5.4, +17 more Red Hat Enterprise Linux Client Optional (v. 7) libvirt-nss 3.9.0-14.el7_5.4, libvirt-admin 3.9.0-14.el7_5.4, libvirt-daemon-lxc 3.9.0-14.el7_5.4, libvirt-login-shell 3.9.0-14.el7_5.4, libvirt-lock-sanlock 3.9.0-14.el7_5.4 Red Hat Enterprise Linux ComputeNode (v. 7) libvirt 3.9.0-14.el7_5.4, libvirt-libs 3.9.0-14.el7_5.4, libvirt-client 3.9.0-14.el7_5.4 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libvirt 3.9.0-14.el7_5.4, libvirt-nss 3.9.0-14.el7_5.4, libvirt-admin 3.9.0-14.el7_5.4, libvirt-daemon 3.9.0-14.el7_5.4, libvirt-daemon-kvm 3.9.0-14.el7_5.4, libvirt-daemon-lxc 3.9.0-14.el7_5.4, +20 more
    fixed: vendor fix RHSA-2018:1396
  • Red Hat Enterprise Linux Desktop (v. 6) libvirt 0.10.2-64.el6, libvirt-client 0.10.2-64.el6, libvirt-python 0.10.2-64.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) libvirt-lock-sanlock 0.10.2-64.el6
    fixed: vendor fix RHSA-2018:1929
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) libvirt 3.9.0-14.el7_5.4, libvirt-libs 3.9.0-14.el7_5.4, libvirt-client 3.9.0-14.el7_5.4, libvirt-daemon 3.9.0-14.el7_5.4, libvirt-daemon-kvm 3.9.0-14.el7_5.4, libvirt-daemon-driver-lxc 3.9.0-14.el7_5.4, +15 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) libvirt 3.9.0-14.el7_5.4, libvirt-nss 3.9.0-14.el7_5.4, libvirt-libs 3.9.0-14.el7_5.4, libvirt-admin 3.9.0-14.el7_5.4, libvirt-client 3.9.0-14.el7_5.4, libvirt-daemon 3.9.0-14.el7_5.4, +20 more
    fixed: vendor fix RHSA-2018:1396
  • Red Hat Enterprise Linux HPC Node (v. 6) libvirt 0.10.2-64.el6, libvirt-client 0.10.2-64.el6, libvirt-python 0.10.2-64.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) libvirt-lock-sanlock 0.10.2-64.el6 Red Hat Enterprise Linux Server (v. 6) libvirt 0.10.2-64.el6, libvirt-client 0.10.2-64.el6, libvirt-python 0.10.2-64.el6
    fixed: vendor fix RHSA-2018:1929
  • Red Hat Enterprise Linux Server (v. 7) libvirt 3.9.0-14.el7_5.4, libvirt-libs 3.9.0-14.el7_5.4, libvirt-client 3.9.0-14.el7_5.4, libvirt-daemon 3.9.0-14.el7_5.4, libvirt-daemon-kvm 3.9.0-14.el7_5.4, libvirt-daemon-driver-lxc 3.9.0-14.el7_5.4, +17 more
    fixed: vendor fix RHSA-2018:1396
  • Red Hat Enterprise Linux Server Optional (v. 6) libvirt-lock-sanlock 0.10.2-64.el6
    fixed: vendor fix RHSA-2018:1929
  • Red Hat Enterprise Linux Server Optional (v. 7) libvirt-nss 3.9.0-14.el7_5.4, libvirt-admin 3.9.0-14.el7_5.4, libvirt-daemon-lxc 3.9.0-14.el7_5.4, libvirt-login-shell 3.9.0-14.el7_5.4, libvirt-lock-sanlock 3.9.0-14.el7_5.4
    fixed: vendor fix RHSA-2018:1396
  • Red Hat Enterprise Linux Workstation (v. 6) libvirt 0.10.2-64.el6, libvirt-client 0.10.2-64.el6, libvirt-python 0.10.2-64.el6
    fixed: vendor fix RHSA-2018:1929
show 5 more
  • Red Hat Enterprise Linux Workstation (v. 7) libvirt 3.9.0-14.el7_5.4, libvirt-libs 3.9.0-14.el7_5.4, libvirt-client 3.9.0-14.el7_5.4, libvirt-daemon 3.9.0-14.el7_5.4, libvirt-daemon-kvm 3.9.0-14.el7_5.4, libvirt-daemon-driver-lxc 3.9.0-14.el7_5.4, +17 more
    fixed: vendor fix RHSA-2018:1396
  • Red Hat Enterprise Linux Workstation Optional (v. 6) libvirt-lock-sanlock 0.10.2-64.el6
    fixed: vendor fix RHSA-2018:1929
  • Red Hat Enterprise Linux Workstation Optional (v. 7) libvirt-nss 3.9.0-14.el7_5.4, libvirt-admin 3.9.0-14.el7_5.4, libvirt-daemon-lxc 3.9.0-14.el7_5.4, libvirt-login-shell 3.9.0-14.el7_5.4, libvirt-lock-sanlock 3.9.0-14.el7_5.4
    fixed: vendor fix RHSA-2018:1396
  • Red Hat Storage Server 3 libvirt-lock-sanlock 0.10.2-64.el6
    fixed: vendor fix RHSA-2018:1929
  • Red Hat Enterprise Linux 5 libvirt
    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

3.17% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

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.