CVE-2016-9603

CriticalCVSS 9.9/10Last modified Jun 17, 2026

Description

A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.

Metrics

CVSS 3.0 9.9/10CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-122CWE-119

Affected software

VendorProductVersions
QEMUQemu:2.9

References

Timeline

Published
Jul 27, 2018
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2016-9603: Critical severity, CVSS 9.9 | Vulnix