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virt: guest to host DoS by triggering an infinite loop in microcode via #AC exception

🗓️ 15 Dec 2015 14:36:40Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 2 Views

Privileged guest users can trigger an infinite microcode loop via alignment check exceptions, causing denial of service on the host.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
BDU FSTEC		The vulnerability of Xen hypervisors, which allows a malicious actor to trigger a service failure
14 Dec 201500:00
–bdu_fstec
Tenable Nessus		CentOS 7 : kernel (CESA-2015:2552)
10 Dec 201500:00
–nessus
Tenable Nessus		CentOS 6 : kernel (CESA-2015:2636)
16 Dec 201500:00
–nessus
Tenable Nessus		Citrix XenServer Multiple Infinite Loop Guest-to-Host DoS (CTX202583)
23 Nov 201500:00
–nessus
Tenable Nessus		Debian DLA-479-1 : xen security update
18 May 201600:00
–nessus
Tenable Nessus		Debian DSA-3396-1 : linux - security update
11 Nov 201500:00
–nessus
Tenable Nessus		Debian DSA-3414-1 : xen - security update
10 Dec 201500:00
–nessus
Tenable Nessus		Debian DSA-3454-1 : virtualbox - security update
28 Jan 201600:00
–nessus
Tenable Nessus		EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1484)
13 May 201900:00
–nessus
Tenable Nessus		EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1488)
13 May 201900:00
–nessus
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux6.5x86_64kernel0:2.6.32-431.68.1.el6kernel-0:2.6.32-431.68.1.el6.x86_64.rpm
Red Hat Enterprise Linux6.5anykernel-abi-whitelists0:2.6.32-431.68.1.el6.noarchkernel-abi-whitelists-0:2.6.32-431.68.1.el6.noarch.noarch.rpm
Red Hat Enterprise Linux6.5x86_64kernel-debug0:2.6.32-431.68.1.el6kernel-debug-0:2.6.32-431.68.1.el6.x86_64.rpm
Red Hat Enterprise Linux6.5x86_64kernel-debug-debuginfo0:2.6.32-431.68.1.el6kernel-debug-debuginfo-0:2.6.32-431.68.1.el6.x86_64.rpm
Red Hat Enterprise Linux6.5x86_64kernel-debug-devel0:2.6.32-431.68.1.el6kernel-debug-devel-0:2.6.32-431.68.1.el6.x86_64.rpm
Red Hat Enterprise Linux6.5x86_64kernel-debuginfo0:2.6.32-431.68.1.el6kernel-debuginfo-0:2.6.32-431.68.1.el6.x86_64.rpm
Red Hat Enterprise Linux6.5x86_64kernel-debuginfo-common-x86_640:2.6.32-431.68.1.el6kernel-debuginfo-common-x86_64-0:2.6.32-431.68.1.el6.x86_64.rpm
Red Hat Enterprise Linux6.5x86_64kernel-devel0:2.6.32-431.68.1.el6kernel-devel-0:2.6.32-431.68.1.el6.x86_64.rpm
Red Hat Enterprise Linux6.5anykernel-doc0:2.6.32-431.68.1.el6.noarchkernel-doc-0:2.6.32-431.68.1.el6.noarch.noarch.rpm
Red Hat Enterprise Linux6.5anykernel-firmware0:2.6.32-431.68.1.el6.noarchkernel-firmware-0:2.6.32-431.68.1.el6.noarch.noarch.rpm
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25 Jun 2026 10:45Current
6.7Medium risk
Vulners AI Score6.7
CVSS 24.9
EPSS0.00566
CWE-835
virtualization securityguest to hostdenial of servicealignment check exceptioninfinite microcode loopx86 architecture
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