CVE-2017-16845

Publication date 17 November 2017

Last updated 25 August 2025

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

Description

hw/input/ps2.c in Qemu does not validate 'rptr' and 'count' values during guest migration, leading to out-of-bounds access.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	18.04 LTS bionic	Fixed 1:2.11+dfsg-1ubuntu7.1
	17.10 artful	Fixed 1:2.10+dfsg-0ubuntu3.5
	17.04 zesty	Ignored end of life
	16.04 LTS xenial	Fixed 1:2.5+dfsg-5ubuntu10.22
	14.04 LTS trusty	Not affected
qemu-kvm	18.04 LTS bionic	Not in release
	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

Notes

mdeslaur

trusty has a fixed-size queue, doesn't look like an issue.

Patch details

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

Package	Patch details
qemu	Upstream: https://git.qemu.org/?p=qemu.git;a=commitdiff;h=802cbcb73002b92e6ddc8464d39b668a71b78d74

Severity score breakdown

CVSS version: CVSS v3.0

Base score 10.0 · Critical

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Changed
Confidentiality impact	High
Integrity impact	None
Availability impact	High

Scores

Parameter	Value
Base score	10.0 · Critical
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3575-1
QEMU vulnerabilities
20 February 2018

USN-3649-1
QEMU vulnerabilities
16 May 2018

Other references

Access our resources on patching vulnerabilities