CVE-2016-6258

high-risk

Published 2016-08-02

The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries.

Do I need to act?

0.11% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 8.8/10 High

LOCAL / LOW complexity

Affected Products (20)

Xen

Xenserver

Xen

Affected Vendors

Citrix Xen

References (20)

Vendor Advisory http://support.citrix.com/article/CTX214954

http://www.debian.org/security/2016/dsa-3633

Release Notes http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htm...

Third Party Advisory http://www.securityfocus.com/bid/92131

Third Party Advisory http://www.securitytracker.com/id/1036446

Mitigation http://xenbits.xen.org/xsa/advisory-182.html

Patch http://xenbits.xen.org/xsa/xsa182-4.5.patch

Patch http://xenbits.xen.org/xsa/xsa182-4.6.patch

Patch http://xenbits.xen.org/xsa/xsa182-unstable.patch

https://security.gentoo.org/glsa/201611-09