CVE-2017-11334

Publication date 2 August 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The address_space_write_continue function in exec.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (out-of-bounds access and guest instance crash) by leveraging use of qemu_map_ram_ptr to access guest ram block area.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu-kvm	18.04 LTS bionic	Not in release
	17.10 artful	Not in release
	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
qemu	18.04 LTS bionic	Not affected
	17.10 artful	Not affected
	17.04 zesty	Ignored end of life
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Ignored
	14.04 LTS trusty	Ignored

Notes

mdeslaur

second commit doesn't look right, lock variable used in dma field, needs more investigation This issue caused a regression for Xen users, and was reverted in USN 3575-2. Since this is a low-severity issue, we are not going to include it in a subsequent update.

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=04bf2526ce87f21b32c9acba1c5518708c243ad0 Upstream: https://git.qemu.org/gitweb.cgi?p=qemu.git;a=commit;h=f5aa69bdc3418773f26747ca282c291519626ece

Severity score breakdown

Parameter	Value
Base score	4.4 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	High
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3575-1
QEMU vulnerabilities
20 February 2018