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kernel: KVM: cmpxchg_gpte can write to pfns outside the userspace region

🗓️ 29 Nov 2022 14:02:34Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 4 Views

KVM vulnerability lets unprivileged host users write outside userspace via cmpxchg_gpte, risking kernel corruption and DoS.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.4x86_64kernel-rt0:4.18.0-305.71.1.rt7.143.el8_4kernel-rt-0:4.18.0-305.71.1.rt7.143.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-core0:4.18.0-305.71.1.rt7.143.el8_4kernel-rt-core-0:4.18.0-305.71.1.rt7.143.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug0:4.18.0-305.71.1.rt7.143.el8_4kernel-rt-debug-0:4.18.0-305.71.1.rt7.143.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-core0:4.18.0-305.71.1.rt7.143.el8_4kernel-rt-debug-core-0:4.18.0-305.71.1.rt7.143.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-debuginfo0:4.18.0-305.71.1.rt7.143.el8_4kernel-rt-debug-debuginfo-0:4.18.0-305.71.1.rt7.143.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-devel0:4.18.0-305.71.1.rt7.143.el8_4kernel-rt-debug-devel-0:4.18.0-305.71.1.rt7.143.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-kvm0:4.18.0-305.71.1.rt7.143.el8_4kernel-rt-debug-kvm-0:4.18.0-305.71.1.rt7.143.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-modules0:4.18.0-305.71.1.rt7.143.el8_4kernel-rt-debug-modules-0:4.18.0-305.71.1.rt7.143.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debug-modules-extra0:4.18.0-305.71.1.rt7.143.el8_4kernel-rt-debug-modules-extra-0:4.18.0-305.71.1.rt7.143.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-rt-debuginfo0:4.18.0-305.71.1.rt7.143.el8_4kernel-rt-debuginfo-0:4.18.0-305.71.1.rt7.143.el8_4.x86_64.rpm
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