Vulnerability in Citrix Xenserver
CVE-2016-9381
Race condition in QEMU in Xen allows local x86 HVM guest OS administrators to gain privileges by changing certain data on shared rings, aka a "double fetch" vulnerability.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (19.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Citrix Xenserver — versions 6.0.2, 6.2.0, 6.5
- Qemu — versions 2.8.0
Weakness classification (CWE)
References
- xenbits.xen.org/xsa/advisory-197.html (Third Party Advisory)
- security.gentoo.org/glsa/201612-56 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/94476 (VDB Entry, Third Party Advisory, vdb-entry)
- support.citrix.com/article/CTX218775 (Third Party Advisory)
- www.securitytracker.com/id/1037344 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2016-9381?
- CVE-2016-9381 is a high-severity vulnerability in Citrix Xenserver, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.5/10. Published 2017-01-23.
- How severe is CVE-2016-9381?
- High severity. CVSS v3 base score is 7.5 out of 10.