CVE-2016-6258

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-08-02 · updated 2026-06-17
Weakness: CWE-284

Description

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.

Affected products

Citrix XenServer: 6.0, 6.0.2, 6.1, 6.2.0-sp1, 6.5.0-sp1, 7.0
xen: 3.4.0, 3.4.2, 3.4.3, 3.4.4, 4.0.0, 4.0.1 (+21)

References

http://support.citrix.com/article/CTX214954
http://www.debian.org/security/2016/dsa-3633
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.securityfocus.com/bid/92131
http://www.securitytracker.com/id/1036446
http://xenbits.xen.org/xsa/advisory-182.html
http://xenbits.xen.org/xsa/xsa182-4.5.patch
http://xenbits.xen.org/xsa/xsa182-4.6.patch
http://xenbits.xen.org/xsa/xsa182-unstable.patch
https://security.gentoo.org/glsa/201611-09
http://support.citrix.com/article/CTX214954
http://www.debian.org/security/2016/dsa-3633

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