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

🗓️ 12 Jan 2016 14:48:34Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 3 Views

Guest to host denial of service via infinite microcode loop triggered by alignment check in virtualization.

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Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux6.6ppc64kernel0:2.6.32-504.40.1.el6kernel-0:2.6.32-504.40.1.el6.ppc64.rpm
Red Hat Enterprise Linux6.6s390xkernel0:2.6.32-504.40.1.el6kernel-0:2.6.32-504.40.1.el6.s390x.rpm
Red Hat Enterprise Linux6.6x86_64kernel0:2.6.32-504.40.1.el6kernel-0:2.6.32-504.40.1.el6.x86_64.rpm
Red Hat Enterprise Linux6.6anykernel0:2.6.32-504.40.1.el6.i686kernel-0:2.6.32-504.40.1.el6.i686.noarch.rpm
Red Hat Enterprise Linux6.6anykernel-abi-whitelists0:2.6.32-504.40.1.el6.noarchkernel-abi-whitelists-0:2.6.32-504.40.1.el6.noarch.noarch.rpm
Red Hat Enterprise Linux6.6ppc64kernel-bootwrapper0:2.6.32-504.40.1.el6kernel-bootwrapper-0:2.6.32-504.40.1.el6.ppc64.rpm
Red Hat Enterprise Linux6.6ppc64kernel-debug0:2.6.32-504.40.1.el6kernel-debug-0:2.6.32-504.40.1.el6.ppc64.rpm
Red Hat Enterprise Linux6.6s390xkernel-debug0:2.6.32-504.40.1.el6kernel-debug-0:2.6.32-504.40.1.el6.s390x.rpm
Red Hat Enterprise Linux6.6x86_64kernel-debug0:2.6.32-504.40.1.el6kernel-debug-0:2.6.32-504.40.1.el6.x86_64.rpm
Red Hat Enterprise Linux6.6anykernel-debug0:2.6.32-504.40.1.el6.i686kernel-debug-0:2.6.32-504.40.1.el6.i686.noarch.rpm
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25 Jun 2026 10:45Current
6.7Medium risk
Vulners AI Score6.7
CVSS 24.9
EPSS0.00566
3