CVE-2016-9603

Publication date 31 December 2016

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.9 · Critical

Score breakdown

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.

Status

Package Ubuntu Release Status
qemu 17.04 zesty
Fixed 1:2.8+dfsg-3ubuntu2.1
16.10 yakkety
Fixed 1:2.6.1+dfsg-0ubuntu5.4
16.04 LTS xenial
Fixed 1:2.5+dfsg-5ubuntu10.11
14.04 LTS trusty
Fixed 2.0.0+dfsg-2ubuntu1.33
12.04 LTS precise Not in release
qemu-kvm 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
12.04 LTS precise
Not affected
xen 17.04 zesty
Not affected
16.10 yakkety
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Fixed 4.4.2-0ubuntu0.14.04.11
12.04 LTS precise Ignored end of life

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
qemu

Severity score breakdown

Parameter Value
Base score 9.9 · Critical
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

Other references