CVE-2017-10920

Description

The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host_map unmapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 1.

Category

10.0
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.13% Top 25%
Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory xen.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://security.gentoo.org/glsa/201708-03 vendor advisory
http://www.debian.org/security/2017/dsa-3969 vendor advisory
http://www.securitytracker.com/id/1038734 vdb entry
https://xenbits.xen.org/xsa/advisory-224.html patch vendor advisory
https://security.gentoo.org/glsa/201710-17 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-10920?
CVE-2017-10920 has been scored as a critical severity vulnerability.
How to fix CVE-2017-10920?
To fix CVE-2017-10920, 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-2017-10920 being actively exploited in the wild?
It is possible that CVE-2017-10920 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% 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.