Vulnerability in Citrix Xenserver

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.

EPSS: 0.001 (29.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

  • Citrix Xenserver — versions 6.0, 6.0.2, 6.1
  • Xen — versions 3.4.0, 3.4.2, 3.4.3
  • N/a — versions n/a

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2016-6258?
CVE-2016-6258 is a high-severity vulnerability in Citrix Xenserver, classified under Improper Access Control. CVSS score: 8.8/10. Published 2016-08-02.
How severe is CVE-2016-6258?
High severity. CVSS v3 base score is 8.8 out of 10.