CVE-2015-8551

Description

The PCI backend driver in Xen, when running on an x86 system and using Linux 3.1.x through 4.3.x as the driver domain, allows local guest administrators to hit BUG conditions and cause a denial of service (NULL pointer dereference and host OS crash) by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and a crafted sequence of XEN_PCI_OP_* operations, aka "Linux pciback missing sanity checks."

Category

6.0
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.09%
Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory xen.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://xenbits.xen.org/xsa/advisory-157.html vendor advisory
http://www.securitytracker.com/id/1034480 vdb entry third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00059.html mailing list third party advisory vendor advisory
https://security.gentoo.org/glsa/201604-03 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html mailing list third party advisory vendor advisory
http://www.debian.org/security/2016/dsa-3434 third party advisory vendor advisory
http://www.securityfocus.com/bid/79546 vdb entry third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html mailing list third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2015-8551?
CVE-2015-8551 has been scored as a medium severity vulnerability.
How to fix CVE-2015-8551?
To fix CVE-2015-8551, 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-2015-8551 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-8551 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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