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kernel: KVM: x86/mmu: race condition in direct_page_fault()

🗓️ 14 Nov 2023 15:24:26Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 3 Views

Race condition in KVM x86 memory management direct_page_fault allows guest users to cause host denial of service when nested virtualization and the TDP MMU are enabled.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8x86_64kernel-rt0:4.18.0-513.5.1.rt7.307.el8_9kernel-rt-0:4.18.0-513.5.1.rt7.307.el8_9.x86_64.rpm
Red Hat Enterprise Linux8x86_64kernel-rt-core0:4.18.0-513.5.1.rt7.307.el8_9kernel-rt-core-0:4.18.0-513.5.1.rt7.307.el8_9.x86_64.rpm
Red Hat Enterprise Linux8x86_64kernel-rt-debug0:4.18.0-513.5.1.rt7.307.el8_9kernel-rt-debug-0:4.18.0-513.5.1.rt7.307.el8_9.x86_64.rpm
Red Hat Enterprise Linux8x86_64kernel-rt-debug-core0:4.18.0-513.5.1.rt7.307.el8_9kernel-rt-debug-core-0:4.18.0-513.5.1.rt7.307.el8_9.x86_64.rpm
Red Hat Enterprise Linux8x86_64kernel-rt-debug-debuginfo0:4.18.0-513.5.1.rt7.307.el8_9kernel-rt-debug-debuginfo-0:4.18.0-513.5.1.rt7.307.el8_9.x86_64.rpm
Red Hat Enterprise Linux8x86_64kernel-rt-debug-devel0:4.18.0-513.5.1.rt7.307.el8_9kernel-rt-debug-devel-0:4.18.0-513.5.1.rt7.307.el8_9.x86_64.rpm
Red Hat Enterprise Linux8x86_64kernel-rt-debug-kvm0:4.18.0-513.5.1.rt7.307.el8_9kernel-rt-debug-kvm-0:4.18.0-513.5.1.rt7.307.el8_9.x86_64.rpm
Red Hat Enterprise Linux8x86_64kernel-rt-debug-modules0:4.18.0-513.5.1.rt7.307.el8_9kernel-rt-debug-modules-0:4.18.0-513.5.1.rt7.307.el8_9.x86_64.rpm
Red Hat Enterprise Linux8x86_64kernel-rt-debug-modules-extra0:4.18.0-513.5.1.rt7.307.el8_9kernel-rt-debug-modules-extra-0:4.18.0-513.5.1.rt7.307.el8_9.x86_64.rpm
Red Hat Enterprise Linux8x86_64kernel-rt-debuginfo0:4.18.0-513.5.1.rt7.307.el8_9kernel-rt-debuginfo-0:4.18.0-513.5.1.rt7.307.el8_9.x86_64.rpm
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28 Jun 2026 12:41Current
6.7Medium risk
Vulners AI Score6.7
CVSS 3.15.5
EPSS0.00256
SSVC
CWE-362
kernel based virtualizationx86 memory managementdirect page faultrace conditionnested virtualizationdenial of service
3