CVE-2015-8555
high-risk
Published 2016-04-13
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.
Do I need to act?
-
0.55% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.6/10
High
NETWORK
/ LOW complexity
References (14)
50
/ 100
high-risk
Severity
29/34 · Critical
Exploitability
2/34 · Minimal
Exposure
19/34 · Moderate