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Fencer Vulns
medium 6.0

CVE-2018-5683 json

The vga_draw_text function in Qemu allows local OS guest privileged users to cause a denial of service (out-of-bounds read and QEMU process…

published 2018-01-23 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-17452

cvss
6.0
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

The vga_draw_text function in Qemu allows local OS guest privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) by leveraging improper memory address validation.

Patch / fix

  • qemu Debian 14, Debian 13, Debian 12 1:2.12~rc3+dfsg-1

debian advisories DEBIAN-CVE-2018-5683

  • qemu Ubuntu 14.04 LTS 2.0.0+dfsg-2ubuntu1.39
  • qemu Ubuntu 16.04 LTS 1:2.5+dfsg-5ubuntu10.22
  • qemu Ubuntu 18.04 LTS 1:2.11+dfsg-1ubuntu2

ubuntu advisories UBUNTU-CVE-2018-5683

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

  • qemu-kvm RHEL 6 2:0.12.1.2-2.506.el6_10.1
  • qemu-img RHEL 6 2:0.12.1.2-2.506.el6_10.1
  • qemu-kvm-tools RHEL 6 2:0.12.1.2-2.506.el6_10.1
  • qemu-guest-agent RHEL 6 2:0.12.1.2-2.506.el6_10.1
  • qemu-kvm-rhev RHEL 7, openstack 12, openstack 11 +3 more 10:2.10.0-21.el7
  • qemu-img-rhev RHEL 7, openstack 12, openstack 11 +3 more 10:2.10.0-21.el7
  • qemu-kvm-tools-rhev RHEL 7, openstack 12, openstack 11 +3 more 10:2.10.0-21.el7
  • qemu-kvm-common-rhev RHEL 7, openstack 12, openstack 11 +3 more 10:2.10.0-21.el7

red hat advisories RHSA-2018:2162RHSA-2018:1113RHSA-2018:1104RHSA-2018:0816

  • kvm SLES 11 SP3-TERADATA, SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 1.4.2-53.17.1
  • kvm SLES for SAP 11 SP4, SLES 11 SP4 1.4.2-60.9.1
  • qemu SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 2.6.2-41.37.1
  • qemu SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 2.9.1-6.12.1
  • xen SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 4.2.5_21-45.19.1
  • xen SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 4.4.4_28-61.23.2
  • xen SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 4.5.5_24-22.43.1
  • xen SLES for SAP 12 SP2, SLES 12 SP2, SLED 12 SP2 +1 more 4.7.4_06-43.24.1

suse advisories SUSE-SU-2018:1308-1SUSE-SU-2018:1077-1SUSE-SU-2018:0831-1SUSE-SU-2018:0762-1SUSE-SU-2018:0678-1SUSE-SU-2018:0638-1

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-2018-5683 updated cvss 3.0

Qemu: Out-of-bounds read in vga_draw_text routine

  • Red Hat Enterprise Linux 5 kvm, xen
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 7 qemu-img, qemu-kvm, libcacard, qemu-kvm-tools, libcacard-tools, qemu-kvm-common
    affected: no fix available
  • Red Hat Enterprise Linux OpenStack Platform 6 (Juno) qemu-kvm-rhev Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) qemu-img-rhev, qemu-kvm-rhev, libcacard-rhev, qemu-kvm-tools-rhev, libcacard-devel-rhev, libcacard-tools-rhev, +1 more
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) qemu-img 1.5.3-156.el7, qemu-kvm 1.5.3-156.el7, qemu-kvm-tools 1.5.3-156.el7, qemu-kvm-common 1.5.3-156.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) qemu-img 1.5.3-156.el7, qemu-kvm 1.5.3-156.el7, qemu-kvm-tools 1.5.3-156.el7, qemu-kvm-common 1.5.3-156.el7
    fixed: vendor fix RHSA-2018:0816
  • Red Hat Enterprise Linux Desktop (v. 6) qemu-img 0.12.1.2-2.506.el6_10.1, qemu-kvm 0.12.1.2-2.506.el6_10.1, qemu-kvm-tools 0.12.1.2-2.506.el6_10.1, qemu-guest-agent 0.12.1.2-2.506.el6_10.1 Red Hat Enterprise Linux HPC Node (v. 6) qemu-img 0.12.1.2-2.506.el6_10.1, qemu-kvm 0.12.1.2-2.506.el6_10.1, qemu-kvm-tools 0.12.1.2-2.506.el6_10.1, qemu-guest-agent 0.12.1.2-2.506.el6_10.1 Red Hat Enterprise Linux Server (v. 6) qemu-img 0.12.1.2-2.506.el6_10.1, qemu-kvm 0.12.1.2-2.506.el6_10.1, qemu-kvm-tools 0.12.1.2-2.506.el6_10.1, qemu-guest-agent 0.12.1.2-2.506.el6_10.1
    fixed: vendor fix RHSA-2018:2162
  • Red Hat Enterprise Linux Server (v. 7) qemu-img 1.5.3-156.el7, qemu-kvm 1.5.3-156.el7, qemu-kvm-tools 1.5.3-156.el7, qemu-kvm-common 1.5.3-156.el7
    fixed: vendor fix RHSA-2018:0816
  • Red Hat Enterprise Linux Workstation (v. 6) qemu-img 0.12.1.2-2.506.el6_10.1, qemu-kvm 0.12.1.2-2.506.el6_10.1, qemu-kvm-tools 0.12.1.2-2.506.el6_10.1, qemu-guest-agent 0.12.1.2-2.506.el6_10.1
    fixed: vendor fix RHSA-2018:2162
  • Red Hat Enterprise Linux Workstation (v. 7) qemu-img 1.5.3-156.el7, qemu-kvm 1.5.3-156.el7, qemu-kvm-tools 1.5.3-156.el7, qemu-kvm-common 1.5.3-156.el7
    fixed: vendor fix RHSA-2018:0816
show 3 more
  • Red Hat OpenStack Platform 8.0 (Liberty) qemu-img-rhev 2.10.0-21.el7, qemu-kvm-rhev 2.10.0-21.el7, qemu-kvm-tools-rhev 2.10.0-21.el7, qemu-kvm-common-rhev 2.10.0-21.el7 Red Hat OpenStack Platform 9.0 qemu-img-rhev 2.10.0-21.el7, qemu-kvm-rhev 2.10.0-21.el7, qemu-kvm-tools-rhev 2.10.0-21.el7, qemu-kvm-common-rhev 2.10.0-21.el7 Red Hat OpenStack Platform 10.0 qemu-img-rhev 2.10.0-21.el7, qemu-kvm-rhev 2.10.0-21.el7, qemu-kvm-tools-rhev 2.10.0-21.el7, qemu-kvm-common-rhev 2.10.0-21.el7 Red Hat OpenStack Platform 11.0 qemu-img-rhev 2.10.0-21.el7, qemu-kvm-rhev 2.10.0-21.el7, qemu-kvm-tools-rhev 2.10.0-21.el7, qemu-kvm-common-rhev 2.10.0-21.el7 Red Hat OpenStack Platform 12.0 qemu-img-rhev 2.10.0-21.el7, qemu-kvm-rhev 2.10.0-21.el7, qemu-kvm-tools-rhev 2.10.0-21.el7, qemu-kvm-common-rhev 2.10.0-21.el7
    fixed: vendor fix RHSA-2018:1113
  • Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts qemu-img-rhev 2.10.0-21.el7, qemu-kvm-rhev 2.10.0-21.el7, qemu-kvm-tools-rhev 2.10.0-21.el7, qemu-kvm-common-rhev 2.10.0-21.el7
    fixed: vendor fix RHSA-2018:1104
  • Red Hat Enterprise Linux 7 qemu-guest-agent Red Hat Enterprise Linux 8 qemu-img, qemu-kvm, qemu-kvm-core, qemu-kvm-tests, qemu-kvm-common, qemu-guest-agent, +8 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

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • lists.gnu.org https://lists.gnu.org/archive/html/qemu-devel/2018-01/msg02597.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

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.