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kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role

🗓️ 14 Jul 2026 05:39:50Reported by RedHatType 
redhat
 redhat
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KVM x86 shadow paging use-after-free caused by unexpected role mismatch when PDE changes in guest.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.10x86_64kernel-rt0:4.18.0-553.143.1.rt7.484.el8_10kernel-rt-0:4.18.0-553.143.1.rt7.484.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-core0:4.18.0-553.143.1.rt7.484.el8_10kernel-rt-core-0:4.18.0-553.143.1.rt7.484.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug0:4.18.0-553.143.1.rt7.484.el8_10kernel-rt-debug-0:4.18.0-553.143.1.rt7.484.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-core0:4.18.0-553.143.1.rt7.484.el8_10kernel-rt-debug-core-0:4.18.0-553.143.1.rt7.484.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-debuginfo0:4.18.0-553.143.1.rt7.484.el8_10kernel-rt-debug-debuginfo-0:4.18.0-553.143.1.rt7.484.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-devel0:4.18.0-553.143.1.rt7.484.el8_10kernel-rt-debug-devel-0:4.18.0-553.143.1.rt7.484.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-kvm0:4.18.0-553.143.1.rt7.484.el8_10kernel-rt-debug-kvm-0:4.18.0-553.143.1.rt7.484.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-modules0:4.18.0-553.143.1.rt7.484.el8_10kernel-rt-debug-modules-0:4.18.0-553.143.1.rt7.484.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debug-modules-extra0:4.18.0-553.143.1.rt7.484.el8_10kernel-rt-debug-modules-extra-0:4.18.0-553.143.1.rt7.484.el8_10.x86_64.rpm
Red Hat Enterprise Linux8.10x86_64kernel-rt-debuginfo0:4.18.0-553.143.1.rt7.484.el8_10kernel-rt-debuginfo-0:4.18.0-553.143.1.rt7.484.el8_10.x86_64.rpm
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