What’s Vulnerable › Vulnerabilities

CVE-2018-7858

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-03-12 · updated 2026-06-17
• Weakness: CWE-125

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
• openSUSE Leap: 42.3
• QEMU: through 2.11.2
• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Server Aus: 7.6
• RedHat Enterprise Linux Server Eus: 7.5, 7.6
• RedHat Enterprise Linux Server Tus: 7.6
• RedHat Enterprise Linux Workstation: 6.0, 7.0

References

• http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html
• http://www.openwall.com/lists/oss-security/2018/03/09/1
• http://www.securityfocus.com/bid/103350
• https://access.redhat.com/errata/RHSA-2018:1369
• https://access.redhat.com/errata/RHSA-2018:1416
• https://access.redhat.com/errata/RHSA-2018:2162
• https://bugzilla.redhat.com/show_bug.cgi?id=1553402
• https://lists.nongnu.org/archive/html/qemu-devel/2018-03/msg02174.html
• https://usn.ubuntu.com/3649-1/
• http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html
• http://www.openwall.com/lists/oss-security/2018/03/09/1
• http://www.securityfocus.com/bid/103350

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