Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host crash) via vectors involving an asynchronous abort while at HYP.

The remote host is affected by the vulnerability described in GLSA-201612-56 (Xen: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Xen. Please review the       CVE identifiers referenced below for details.
  Impact :

    A local attacker could possibly execute arbitrary code with the       privileges of the process, could gain privileges on the host system,       cause a Denial of Service condition, or obtain sensitive information.
  Workaround :

    There is no known workaround at this time.

x86 CMPXCHG8B emulation fails to ignore operand size override [XSA-200, CVE-2016-9932] (#1404262)

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ARM guests may induce host asynchronous abort [XSA-201, CVE-2016-9815, CVE-2016-9816, CVE-2016-9817, CVE-2016-9818] (#1399747) qemu: Divide by zero vulnerability in cirrus_do_copy (#1399055) [CVE-2016-9921, CVE-2016-9922] Qemu: 9pfs: memory leakage via proxy/handle callbacks (#1402278) qemu ioport array overflow [XSA-199, CVE-2016-9637]

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ARM guests may induce host asynchronous abort [XSA-201, CVE-2016-9815, CVE-2016-9816, CVE-2016-9817, CVE-2016-9818] (#1399747) qemu: Divide by zero vulnerability in cirrus_do_copy (#1399055) [CVE-2016-9921, CVE-2016-9922] Qemu: 9pfs: memory leakage via proxy/handle callbacks (#1402278) qemu ioport array overflow [XSA-199, CVE-2016-9637]

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
96231	GLSA-201612-56 : Xen: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
96113	Fedora 24 : xen (2016-bcbae0781f)	Nessus	Fedora Local Security Checks	high
96025	Fedora 23 : xen (2016-cc2916dcf4)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2016-9818

medium

Tenable Plugins

high

high

high