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

🗓️ 02 Feb 2016 16:58:30Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 3 Views

Guest can cause host denial of service by triggering an infinite microcode loop with a debug exception in virtualized x86.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7.1ppc64lekernel0:3.10.0-229.26.2.ael7bkernel-0:3.10.0-229.26.2.ael7b.ppc64le.rpm
Red Hat Enterprise Linux7.1ppc64kernel0:3.10.0-229.26.2.el7kernel-0:3.10.0-229.26.2.el7.ppc64.rpm
Red Hat Enterprise Linux7.1s390xkernel0:3.10.0-229.26.2.el7kernel-0:3.10.0-229.26.2.el7.s390x.rpm
Red Hat Enterprise Linux7.1x86_64kernel0:3.10.0-229.26.2.el7kernel-0:3.10.0-229.26.2.el7.x86_64.rpm
Red Hat Enterprise Linux7.1anykernel-abi-whitelists0:3.10.0-229.26.2.ael7b.noarchkernel-abi-whitelists-0:3.10.0-229.26.2.ael7b.noarch.noarch.rpm
Red Hat Enterprise Linux7.1anykernel-abi-whitelists0:3.10.0-229.26.2.el7.noarchkernel-abi-whitelists-0:3.10.0-229.26.2.el7.noarch.noarch.rpm
Red Hat Enterprise Linux7.1ppc64lekernel-bootwrapper0:3.10.0-229.26.2.ael7bkernel-bootwrapper-0:3.10.0-229.26.2.ael7b.ppc64le.rpm
Red Hat Enterprise Linux7.1ppc64kernel-bootwrapper0:3.10.0-229.26.2.el7kernel-bootwrapper-0:3.10.0-229.26.2.el7.ppc64.rpm
Red Hat Enterprise Linux7.1ppc64lekernel-debug0:3.10.0-229.26.2.ael7bkernel-debug-0:3.10.0-229.26.2.ael7b.ppc64le.rpm
Red Hat Enterprise Linux7.1ppc64kernel-debug0:3.10.0-229.26.2.el7kernel-debug-0:3.10.0-229.26.2.el7.ppc64.rpm
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28 Jun 2026 12:26Current
6.7Medium risk
Vulners AI Score6.7
CVSS 24.7
CVSS 3.110
EPSS0.02501
SSVC
3