Astra Linux - уязвимость в linux-5.10

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: nSVM: fixed a potential NULL dereference during nested migration. It turns out that due to feedback from reviews and/or changes in relocation locations, I accidentally moved the call to nestedsvmloadcr3 too early, befor...

Astra Linux - уязвимость в linux-5.10

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Forcibly leave nested virtualization mode when SMM state is toggled The nested virtualization mode is forcibly exited if the user space toggles the SMM state using KVMSETVCPUEVENTS or KVMSYNCX86EVENTS. If the user space...

kernel: KVM: x86: Load DR6 with guest value only before entering .vcpu_run() loop

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Load DR6 with guest value only before entering .vcpurun loop Move the conditional loading of hardware DR6 with the guest's DR6 value out of the core .vcpurun loop to fix a bug where KVM can load hardware with a stale...

EUVD-2026-28585

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Remove a user-triggerable WARN on nestedsvmloadcr3 succeeding Drop the WARN in svmsetnestedstate on nestedsvmloadcr3 failing as it is trivially easy to trigger from userspace by modifying CPUID after loading CR3. E.g...

CVE-2026-43315

CVE-2026-43315 involves the Linux kernel KVM nSVM warning path. Technical details across connected docs show that a user-triggerable WARN is raised in svm_set_nested_state() when nested_svm_load_cr3() succeeds, and the patch removes this WARN. The rationale is that userspace can easily trigger th...

CVE-2026-43315

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Remove a user-triggerable WARN on nestedsvmloadcr3 succeeding Drop the WARN in svmsetnestedstate on nestedsvmloadcr3 failing as it is trivially easy to trigger from userspace by modifying CPUID after loading CR3. E.g...

PT-2026-38957

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM nSVM component where a user-triggerable warning occurs in the svm set nested state function when nested svm load cr3 fails. This condition can be easily...

Linux Distros Unpatched Vulnerability : CVE-2026-43315

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - KVM: nSVM: Remove a user-triggerable WARN on nestedsvmloadcr3 succeeding Drop the WARN in svmsetnestedstate on nestedsvmloadcr3 failing as it is trivially easy...

CVE-2026-43133

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM nSVM module. When a nested virtual machine L2 guest executes VMSAVE/VMLOAD instructions, and these are not intercepted by the first-level hypervisor L1, KVM incorrectly uses vmcb02 instead of vmcb01 for managing guest state...

EUVD-2026-27695

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation Commit cc3ed80ae69f "KVM: nSVM: always use vmcb01 to for vmsave/vmload of guest state" made KVM always use vmcb01 for the fields controlled by VMSAVE/VMLOAD, but it missed...

CVE-2026-43133

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation Commit cc3ed80ae69f "KVM: nSVM: always use vmcb01 to for vmsave/vmload of guest state" made KVM always use vmcb01 for the fields controlled by VMSAVE/VMLOAD, but it missed...

Astra Linux - уязвимость в linux

A flaw was discovered in the KVM’s AMD code, responsible for supporting SVM nested virtualization. The flaw occurs during the processing of the VMCB virtual machine control block provided by the L1 guest, which is used to spawn or handle a nested guest L2. Due to improper validation of the...

Astra Linux - уязвимость в linux

A flaw was discovered in the KVM’s AMD code, responsible for supporting SVM nested virtualization. The flaw occurs during the processing of the VMCB virtual machine control block provided by the L1 guest, which is used to spawn or handle a nested guest L2. Due to improper validation of the “intct...

Astra Linux - уязвимость в linux-5.10, linux-5.15

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Warns when a triple fault assertion never “escapes” from L2 The warnings are removed because they perform a sanity check that ensures KVM never allows a triple fault in L2 to escape and end up in L1. In normal operation...

Astra Linux - уязвимость в linux-5.15

A race condition in the x86 KVM subsystem within the Linux kernel, as of 6.1-rc6, allows guest OS users to cause a denial of service host OS crash or host OS memory corruption when nested virtualization is enabled and the TDP MMU is also enabled...

Astra Linux - уязвимость в linux-5.15

A flaw was discovered in the AMD nested virtualization SVM feature of the KVM. A malicious L1 guest could intentionally fail to intercept the shutdown of a cooperative nested guest L2, potentially causing a page fault and kernel panic in the host L0...

Astra Linux - уязвимость в linux-6.1

In the Linux kernel, the following vulnerabilities have been resolved: KVM: x86: Acquiring kvm-srcu when handling KVMSETVCPUEVENTS Acquire kvm-srcu when processing KVMSETVCPUEVENTS. When KVM sets the SMM mode, it forcibly leaves the nested VMX/SVM state. Leaving such a state also causes nested VM...

Unity Linux 20.1050e Security Update: kernel (UTSA-2026-005138)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005138 advisory. In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Ignore nCR34:0 when loading PDPTEs from memory Ignore nCR34:0 when loading PDPTEs from...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003959)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003959 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 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001167)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001167 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...