CVE-2021-47389

CVE-2021-47389 is a Linux kernel/KVM SVM issue related to SevReceiveStart and SEV context decommission. The root cause was a missing SEV decommission step when ASID binding fails after RECEIVE_START, which can leak firmware memory and eventually prevent allocating new SEV guest contexts, causing ...

CVE-2021-47389

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: fix missing sevdecommission in sevreceivestart DECOMMISSION the current SEV context if binding an ASID fails after RECEIVESTART. Per AMD's SEV API, RECEIVESTART generates a new guest context and thus needs to be paired...

CVE-2021-47390 KVM: x86: Fix stack-out-of-bounds memory access from ioapic_write_indirect()

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix stack-out-of-bounds memory access from ioapicwriteindirect KASAN reports the following issue: BUG: KASAN: stack-out-of-bounds in kvmmakevcpusrequestmask+0x174/0x440 kvm Read of size 8 at addr ffffc9001364f638 by tas...

CVE-2021-47389 KVM: SVM: fix missing sev_decommission in sev_receive_start

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: fix missing sevdecommission in sevreceivestart DECOMMISSION the current SEV context if binding an ASID fails after RECEIVESTART. Per AMD's SEV API, RECEIVESTART generates a new guest context and thus needs to be paired...

CVE-2021-47341 KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio

In the Linux kernel, the following vulnerability has been resolved: KVM: mmio: Fix use-after-free Read in kvmvmioctlunregistercoalescedmmio BUG: KASAN: use-after-free in kvmvmioctlunregistercoalescedmmio+0x7c/0x1ec arch/arm64/kvm/../../../virt/kvm/coalescedmmio.c:183 Read of size 8 at addr...

CVE-2021-47341 KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio

In the Linux kernel, the following vulnerability has been resolved: KVM: mmio: Fix use-after-free Read in kvmvmioctlunregistercoalescedmmio BUG: KASAN: use-after-free in kvmvmioctlunregistercoalescedmmio+0x7c/0x1ec arch/arm64/kvm/../../../virt/kvm/coalescedmmio.c:183 Read of size 8 at addr...

CVE-2021-47341

In the Linux kernel, the following vulnerability has been resolved: KVM: mmio: Fix use-after-free Read in kvmvmioctlunregistercoalescedmmio BUG: KASAN: use-after-free in kvmvmioctlunregistercoalescedmmio+0x7c/0x1ec arch/arm64/kvm/../../../virt/kvm/coalescedmmio.c:183 Read of size 8 at addr...

CVE-2021-47341

CVE-2021-47341 concerns the Linux kernel KVM mmio path, where a use-after-free flaw in kvm_vm_ioctl_unregister_coalesced_mmio could enable a flawed memory read (8 bytes) via a read access after the object is freed. The issue is in the ARM64 KVM coalesced_mmio code path and Trace shows a use-after...

CVE-2021-47296

CVE-2021-47296 affects the Linux kernel KVM on PPC. The issue is a leak in vcpu_load due to vcpu_put not being called when a user copy fails, which can corrupt preempt notifiers and cause crashes. The vulnerability is resolved via a kernel patch (details present in the connected advisories), with...

CVE-2021-47296 KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak

In the Linux kernel, the following vulnerability has been resolved: KVM: PPC: Fix kvmarchvcpuioctl vcpuload leak vcpuput is not called if the user copy fails. This can result in preempt notifier corruption and crashes, among other issues...

CVE-2021-47296 KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak

In the Linux kernel, the following vulnerability has been resolved: KVM: PPC: Fix kvmarchvcpuioctl vcpuload leak vcpuput is not called if the user copy fails. This can result in preempt notifier corruption and crashes, among other issues...

CVE-2021-47296

In the Linux kernel, the following vulnerability has been resolved: KVM: PPC: Fix kvmarchvcpuioctl vcpuload leak vcpuput is not called if the user copy fails. This can result in preempt notifier corruption and crashes, among other issues...

CVE-2021-47277 kvm: avoid speculation-based attacks from out-of-range memslot accesses

In the Linux kernel, the following vulnerability has been resolved: kvm: avoid speculation-based attacks from out-of-range memslot accesses KVM's mechanism for accessing guest memory translates a guest physical address gpa to a host virtual address using the right-shifted gpa also known as gfn an...

CVE-2021-47277 kvm: avoid speculation-based attacks from out-of-range memslot accesses

In the Linux kernel, the following vulnerability has been resolved: kvm: avoid speculation-based attacks from out-of-range memslot accesses KVM's mechanism for accessing guest memory translates a guest physical address gpa to a host virtual address using the right-shifted gpa also known as gfn an...

CVE-2021-47277

CVE-2021-47277 affects the Linux kernel KVM path for guest memory translation. The issue arises when speculative execution may use an invalid guest frame number (gfn) to compute an out-of-bounds host virtual address (hva) in __gfn_to_hva_memslot, enabling a potential two-read Spectre gadget where...

CVE-2021-47277

In the Linux kernel, the following vulnerability has been resolved: kvm: avoid speculation-based attacks from out-of-range memslot accesses KVM's mechanism for accessing guest memory translates a guest physical address gpa to a host virtual address using the right-shifted gpa also known as gfn an...

CVE-2021-47262

CVE-2021-47262 concerns the Linux kernel KVM subsystem. The issue arises in the x86 KVM tracepoint handling for nested VM-Enter failures, where string literals used by the “nested VM-Enter failed” tracepoint could outlive memory they reference if the tracepoint is emitted from modules (e.g., kvm-...

CVE-2021-47262 KVM: x86: Ensure liveliness of nested VM-Enter fail tracepoint message

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ensure liveliness of nested VM-Enter fail tracepoint message Use the string machinery provided by the tracing subystem to make a copy of the string literals consumed by the "nested VM-Enter failed" tracepoint. A complet...

CVE-2021-47262

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ensure liveliness of nested VM-Enter fail tracepoint message Use the string machinery provided by the tracing subystem to make a copy of the string literals consumed by the "nested VM-Enter failed" tracepoint. A complet...

CVE-2021-47262 KVM: x86: Ensure liveliness of nested VM-Enter fail tracepoint message

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ensure liveliness of nested VM-Enter fail tracepoint message Use the string machinery provided by the tracing subystem to make a copy of the string literals consumed by the "nested VM-Enter failed" tracepoint. A complet...