CVE-2017-12809

Publication date 23 August 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

QEMU (aka Quick Emulator), when built with the IDE disk and CD/DVD-ROM Emulator support, allows local guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process crash) by flushing an empty CDROM device drive.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	17.04 zesty	Fixed 1:2.8+dfsg-3ubuntu2.4
	16.04 LTS xenial	Fixed 1:2.5+dfsg-5ubuntu10.15
	14.04 LTS trusty	Not affected
qemu-kvm	17.04 zesty	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

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/gitweb.cgi?p=qemu.git;a=commit;h=4da97120d51a4383aa96d741a2b837f8c4bbcd0b

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-3414-1
QEMU vulnerabilities
13 September 2017