CVE-2016-9603
Qemu: cirrus: heap buffer overflow via vnc connection
Severity
ImportantRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · March 14, 2017
Updated · June 30, 2026
Description
A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support; 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.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 5.5CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
CVSS 2.0 · 4.9AV:A/AC:M/Au:S/C:P/I:P/A:P
CWE-122 · Heap-based Buffer Overflow