VulnerabilityModified
CVE-2016-6258
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.
HIGH 8.8EPSS 0.40%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.40% probability · 34th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-284
- Affected
- xen/xen · citrix/xenserver
- Source
- cve@mitre.org
References
- http://support.citrix.com/article/CTX214954Vendor Advisory
- http://www.debian.org/security/2016/dsa-3633
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlRelease Notes
- http://www.securityfocus.com/bid/92131Third Party Advisory
- http://www.securitytracker.com/id/1036446Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-182.htmlMitigation, Patch, Vendor Advisory
- http://xenbits.xen.org/xsa/xsa182-4.5.patchPatch
- http://xenbits.xen.org/xsa/xsa182-4.6.patchPatch
- http://xenbits.xen.org/xsa/xsa182-unstable.patchPatch
- https://security.gentoo.org/glsa/201611-09
- http://support.citrix.com/article/CTX214954Vendor Advisory
- http://www.debian.org/security/2016/dsa-3633
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlRelease Notes
- http://www.securityfocus.com/bid/92131Third Party Advisory
- http://www.securitytracker.com/id/1036446Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-182.htmlMitigation, Patch, Vendor Advisory
- http://xenbits.xen.org/xsa/xsa182-4.5.patchPatch
- http://xenbits.xen.org/xsa/xsa182-4.6.patchPatch
- http://xenbits.xen.org/xsa/xsa182-unstable.patchPatch
- https://security.gentoo.org/glsa/201611-09
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.