CVE-2016-9386

Description

The x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow local HVM guest users to gain privileges via vectors involving "unexpected" base/limit values.

Category

7.8
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.10%
Vendor Advisory gentoo.org Vendor Advisory xen.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/94471 vdb entry third party advisory
https://security.gentoo.org/glsa/201612-56 vendor advisory
https://support.citrix.com/article/CTX218775 third party advisory patch
http://xenbits.xen.org/xsa/advisory-191.html patch vendor advisory
http://www.securitytracker.com/id/1037340 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2016-9386?
CVE-2016-9386 has been scored as a high severity vulnerability.
How to fix CVE-2016-9386?
To fix CVE-2016-9386, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-9386 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-9386 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.