CVE-2018-7858
MEDIUMCVSS 5.5/10EPSS 0.64%
Last modified
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/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
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
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2018-7858?
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.
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2018-7858?
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