CVE-2015-8550

Description

Xen, when used on a system providing PV backends, allows local guest OS administrators to cause a denial of service (host OS crash) or gain privileges by writing to memory shared between the frontend and backend, aka a double fetch vulnerability.

Category

8.2
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 15.96% Top 10%
Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory debian.org Vendor Advisory opensuse.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.securityfocus.com/bid/79592 vdb entry third party advisory
http://xenbits.xen.org/xsa/advisory-155.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html vendor advisory
http://www.securitytracker.com/id/1034479 vdb entry third party advisory
https://security.gentoo.org/glsa/201604-03 vendor advisory
http://www.debian.org/security/2016/dsa-3471 vendor advisory
http://www.debian.org/security/2016/dsa-3434 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2015-8550?
CVE-2015-8550 has been scored as a high severity vulnerability.
How to fix CVE-2015-8550?
To fix CVE-2015-8550, 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-2015-8550 being actively exploited in the wild?
It is possible that CVE-2015-8550 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~16% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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