What’s Vulnerable › Vulnerabilities

CVE-2017-2633

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-07-27 · updated 2026-06-17
• Weakness: CWE-120

Description

An out-of-bounds memory access issue was found in Quick Emulator (QEMU) before 1.7.2 in the VNC display driver. This flaw could occur while refreshing the VNC display surface area in the 'vnc_refresh_server_surface'. A user inside a guest could use this flaw to crash the QEMU process.

Affected products

• QEMU: before 1.7.2 — fixed in 1.7.2
• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Server Aus: 7.4
• RedHat Enterprise Linux Server Eus: 7.4, 7.5
• RedHat Enterprise Linux Workstation: 6.0, 7.0

How to fix

Upgrade to a fixed version: QEMU 1.7.2. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2017/02/23/1
• http://www.securityfocus.com/bid/96417
• https://access.redhat.com/errata/RHSA-2017:1205
• https://access.redhat.com/errata/RHSA-2017:1206
• https://access.redhat.com/errata/RHSA-2017:1441
• https://access.redhat.com/errata/RHSA-2017:1856
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2633
• https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=9f64916da20eea67121d544698676295bbb105a7
• https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=bea60dd7679364493a0d7f5b54316c767cf894ef
• http://www.openwall.com/lists/oss-security/2017/02/23/1
• http://www.securityfocus.com/bid/96417
• https://access.redhat.com/errata/RHSA-2017:1205

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