CVE-2017-8086

Publication date 2 May 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Memory leak in the v9fs_list_xattr function in hw/9pfs/9p-xattr.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (memory consumption) via vectors involving the orig_value variable.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	21.04 hirsute	Fixed 1:2.8+dfsg-3ubuntu3
	20.10 groovy	Fixed 1:2.8+dfsg-3ubuntu3
	20.04 LTS focal	Fixed 1:2.8+dfsg-3ubuntu3
	19.10 eoan	Fixed 1:2.8+dfsg-3ubuntu3
	19.04 disco	Fixed 1:2.8+dfsg-3ubuntu3
	18.10 cosmic	Fixed 1:2.8+dfsg-3ubuntu3
	18.04 LTS bionic	Fixed 1:2.8+dfsg-3ubuntu3
	17.10 artful	Fixed 1:2.8+dfsg-3ubuntu3
	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	Fixed 2.0.0+dfsg-2ubuntu1.34
	12.04 LTS precise	Not in release
qemu-kvm	21.04 hirsute	Not in release
	20.10 groovy	Not in release
	20.04 LTS focal	Not in release
	19.10 eoan	Not in release
	19.04 disco	Not in release
	18.10 cosmic	Not in release
	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
	12.04 LTS precise	Ignored end of life

Notes

mdeslaur

possibly introduced by fix for CVE-2016-9602

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=4ffcdef4277a91af15a3c09f7d16af072c29f3f2

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