CVE-2017-2596

Description

The nested_vmx_check_vmptr function in arch/x86/kvm/vmx.c in the Linux kernel through 4.9.8 improperly emulates the VMXON instruction, which allows KVM L1 guest OS users to cause a denial of service (host OS memory consumption) by leveraging the mishandling of page references.

Category

6.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.05%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1417812 issue tracking patch
http://www.openwall.com/lists/oss-security/2017/01/31/4 mailing list third party advisory patch
http://www.securityfocus.com/bid/95878 vdb entry third party advisory
https://access.redhat.com/errata/RHSA-2017:2077 vendor advisory
https://access.redhat.com/errata/RHSA-2017:1842 vendor advisory
http://www.debian.org/security/2017/dsa-3791 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-2596?
CVE-2017-2596 has been scored as a medium severity vulnerability.
How to fix CVE-2017-2596?
To fix CVE-2017-2596, 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-2017-2596 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-2596 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.
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