CVE-2015-8555

Description

Xen 4.6.x, 4.5.x, 4.4.x, 4.3.x, and earlier do not initialize x86 FPU stack and XMM registers when XSAVE/XRSTOR are not used to manage guest extended register state, which allows local guest domains to obtain sensitive information from other domains via unspecified vectors.

Category

8.6
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.72% Top 30%
Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory xen.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.debian.org/security/2016/dsa-3519 vendor advisory
http://www.securitytracker.com/id/1034477 vdb entry
http://www.securityfocus.com/bid/79543 vdb entry
http://xenbits.xen.org/xsa/advisory-165.html patch vendor advisory
https://security.gentoo.org/glsa/201604-03 vendor advisory
http://support.citrix.com/article/CTX203879

Frequently Asked Questions

What is the severity of CVE-2015-8555?
CVE-2015-8555 has been scored as a high severity vulnerability.
How to fix CVE-2015-8555?
To fix CVE-2015-8555, 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-2015-8555 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-8555 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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