CVE-2018-7858

Name: CVE-2018-7858
Creator: NVD / NIST
Published: 2018-03-12T21:29:01.267+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.64%

Last modified Jun 17, 2026

CVE-2018-7858 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by leveraging incorrect region calculation when updating VGA display.. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

Description

Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by leveraging incorrect region calculation when updating VGA display.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.64%

45.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Qemu	Qemu	<= 2.11.2
Opensuse	Leap	42.3
Redhat	Enterprise Linux Desktop	6.0
Redhat	Enterprise Linux Desktop	7.0
Redhat	Enterprise Linux Server	6.0
Redhat	Enterprise Linux Server	7.0
Redhat	Enterprise Linux Server Aus	7.6
Redhat	Enterprise Linux Server Eus	7.5
Redhat	Enterprise Linux Server Eus	7.6
Redhat	Enterprise Linux Server Tus	7.6
Redhat	Enterprise Linux Workstation	6.0
Redhat	Enterprise Linux Workstation	7.0
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	18.10

References

http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.htmlMailing List, Release Notes, Third Party Advisory
http://www.openwall.com/lists/oss-security/2018/03/09/1Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/103350Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:1369Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1416Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2162Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1553402Issue Tracking, Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2018-03/msg02174.htmlMailing List, Patch, Vendor Advisory
https://usn.ubuntu.com/3649-1/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.htmlMailing List, Release Notes, Third Party Advisory
http://www.openwall.com/lists/oss-security/2018/03/09/1Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/103350Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:1369Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1416Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2162Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1553402Issue Tracking, Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2018-03/msg02174.htmlMailing List, Patch, Vendor Advisory
https://usn.ubuntu.com/3649-1/Third Party Advisory

Timeline

Published: Mar 12, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-7858?

How severe is CVE-2018-7858?

CVE-2018-7858 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7858?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-7858?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST