Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Citrix | Xenserver | 6.0 |
| Xen | Xen | 4.3.0 |
Related Weaknesses (CWE)
References
- http://support.citrix.com/article/CTX203879
- http://www.debian.org/security/2016/dsa-3519
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htm
- http://www.securityfocus.com/bid/79543
- http://www.securitytracker.com/id/1034477
- http://xenbits.xen.org/xsa/advisory-165.htmlPatchVendor Advisory
- https://security.gentoo.org/glsa/201604-03
- http://support.citrix.com/article/CTX203879
- http://www.debian.org/security/2016/dsa-3519
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htm
- http://www.securityfocus.com/bid/79543
- http://www.securitytracker.com/id/1034477
- http://xenbits.xen.org/xsa/advisory-165.htmlPatchVendor Advisory
- https://security.gentoo.org/glsa/201604-03
FAQ
What is CVE-2015-8555?
CVE-2015-8555 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 t...
How severe is CVE-2015-8555?
CVE-2015-8555 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-8555?
Check the references section above for vendor advisories and patch information. Affected products include: Citrix Xenserver, Xen Xen.