Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-004318)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004318 advisory. A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister MSR access with nested=1 virtualization enabled. In that, L1 guest could access...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-002569)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002569 advisory. arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003277)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003277 advisory. In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowin...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003187)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003187 advisory. arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003045)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003045 advisory. A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested=1 virtualization is enabled. In...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-002978)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002978 advisory. A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested=1 virtualization is enabled. In...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-002979)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002979 advisory. In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowin...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-002570)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002570 advisory. The nestedvmxcheckvmptr function in arch/x86/kvm/vmx.c in the Linux kernel through 4.9.8 improperly emulates the VMXON instruction, which allows KVM L1 guest OS user...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-000309)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-000309 advisory. A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested=1 virtualization is enabled. In...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-000232)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-000232 advisory. A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister MSR access with nested=1 virtualization enabled. In that, L1 guest could access...

CVE-2023-53756

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of Hyper-V. When MSR bitmap is updated, evmcstouchmsrbitmap function uses...

DEBIAN-CVE-2023-53756

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of Hyper-V. When MSR bitmap is updated, evmcstouchmsrbitmap function uses...

CVE-2023-53756

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of Hyper-V. When MSR bitmap is updated, evmcstouchmsrbitmap function uses...

UBUNTU-CVE-2023-53756

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of Hyper-V. When MSR bitmap is updated, evmcstouchmsrbitmap function uses...

CVE-2023-53756 KVM: VMX: Fix crash due to uninitialized current_vmcs

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of Hyper-V. When MSR bitmap is updated, evmcstouchmsrbitmap function uses...

CVE-2023-53756 KVM: VMX: Fix crash due to uninitialized current_vmcs

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of Hyper-V. When MSR bitmap is updated, evmcstouchmsrbitmap function uses...

CVE-2023-53756

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables 'Enlightened VMCS' and 'Enlightened MSR Bitmap' when running as a nested hypervisor on top of Hyper-V. When MSR bitmap is updated, evmcstouchmsrbitmap function uses...

Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989806)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-989806 advisory. In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Forcibly leave nested virt when SMM state is toggled Forcibly leave nested virtualizati...

UBUNTU-CVE-2023-53663

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Check instead of asserting on nested TSC scaling support Check for nested TSC scaling support on nested SVM VMRUN instead of asserting that TSC scaling is exposed to L1 if L1's MSRAMD64TSCRATIO has diverged from KVM's...

EUVD-2025-32763

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Check instead of asserting on nested TSC scaling support Check for nested TSC scaling support on nested SVM VMRUN instead of asserting that TSC scaling is exposed to L1 if L1's MSRAMD64TSCRATIO has diverged from KVM's...