CVE-2017-8379

Publication date 3 May 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Memory leak in the keyboard input event handlers support in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (host memory consumption) by rapidly generating large keyboard events.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	17.04 zesty	Fixed 1:2.8+dfsg-3ubuntu2.2
	16.10 yakkety	Fixed 1:2.6.1+dfsg-0ubuntu5.5
	16.04 LTS xenial	Fixed 1:2.5+dfsg-5ubuntu10.14
	14.04 LTS trusty	Not affected
	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

Notes

mdeslaur

trusty and earlier don't support keyboard delays

Patch details

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

Package	Patch details
qemu	Upstream: http://git.qemu.org/?p=qemu.git;a=commit;h=fa18f36a461984eae50ab957e47ec78dae3c14fc Upstream: http://git.qemu.org/?p=qemu.git;a=commit;h=05c6638b203fd7d8bbfa88ac6e6198e32ed0506f

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3289-1
QEMU vulnerabilities
16 May 2017