Session fixation

A vulnerability was found in the Linux kernel's KVM subsystem in arch/x86/kvm/lapic.c kvmfreelapic when a failure allocation was detected. In this flaw the KVM subsystem may crash the kernel due to mishandling of memory errors that happens during VCPU construction, which allows an attacker with...

CVE-2021-4032

A vulnerability was found in the Linux kernel's KVM subsystem in arch/x86/kvm/lapic.c kvmfreelapic when a failure allocation was detected. In this flaw the KVM subsystem may crash the kernel due to mishandling of memory errors that happens during VCPU construction, which allows an attacker with...

Linux kernel 安全漏洞

Linux kernel is the kernel used by the Linux Foundation's open source operating system, Linux, of which KVM is a kernel-based virtual machine. Linux kernel suffers from a denial-of-service vulnerability, which stems from the possibility that the KVM subsystem may mishandle a memory error that...

Linux Kernel kvm_dirty_ring_get() function denial of service vulnerability

Linux kernel is the kernel used by the Linux Foundation's open source operating system Linux. Linux Kernel kvmdirtyringget suffers from a function denial of service vulnerability, which is caused by the kvmdirtyring function in virt/kvm/dirtyring.c without creating a vCPU. dirtyring function in...

CVE-2021-4095

A NULL pointer dereference was found in the Linux kernel's KVM when dirty ring logging is enabled without an active vCPU context. An unprivileged local attacker on the host may use this flaw to cause a kernel oops condition and thus a denial of service by issuing a KVMXENHVMSETATTR ioctl...

PT-2021-7295 · Linux +1 · Linux Kernel +1

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 5.15 rc7 Description: The issue is related to incomplete cleanup of temporary or auxiliary resources in the arch/x86/kvm/lapic.c component of the Kernel-based Virtual Machine KVM subsystem in the Linux kernel...

UVI-2021-1001312 KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak

KVM: PPC: Fix kvmarchvcpuioctl vcpuload leak This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.136 by commit...

UVI-2021-1001244 KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak

KVM: PPC: Fix kvmarchvcpuioctl vcpuload leak This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.10.54 by commit...

UVI-2021-1000022 KVM: VMX: Don't use vcpu->run->internal.ndata as an array index

KVM: VMX: Don't use vcpu-run-internal.ndata as an array index This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.10.32 by commit...

UVI-2021-1000012 KVM: VMX: Don't use vcpu->run->internal.ndata as an array index

KVM: VMX: Don't use vcpu-run-internal.ndata as an array index This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.11.16 by commit...

GSD-2021-1000012 KVM: VMX: Don't use vcpu->run->internal.ndata as an array index

KVM: VMX: Don't use vcpu-run-internal.ndata as an array index This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.11.16 by commit...

SUSE: Security Advisory (SUSE-SU-2018:0007-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2021 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

DEBIAN-CVE-2020-29570

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels c...

FIFO event channels control block related ordering

ISSUE DESCRIPTION Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. IMPACT Malicious or buggy guest kernels can mount a Denial of...

Fedora 31 : xen (2020-d46fe34349)

x86 pv: Crash when handling guest access to MSRMISCENABLE XSA-333, CVE-2020-25602 1881619 Missing unlock in XENMEMacquireresource error path XSA-334, CVE-2020-25598 1881616 race when migrating timers between x86 HVM vCPU-s XSA-336, CVE-2020-25604 1881618 PCI passthrough code reading back hardware...

CVE-2020-25604: Concurrent Execution using Shared Resource with Improper Synchronization

An issue was discovered in Xen through 4.14.x. There is a race condition when migrating timers between x86 HVM vCPUs. When migrating timers of x86 HVM guests between its vCPUs, the locking model used allows for a second vCPU of the same guest also operating on the timers to release a lock that it...

ALPINE-CVE-2020-15564

An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOPregistervcpuinfo. The hypercall VCPUOPregistervcpuinfo is used by a guest to register a shared region with the hypervisor. The region will be mapped...

CVE-2020-15564

An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOPregistervcpuinfo. The hypercall VCPUOPregistervcpuinfo is used by a guest to register a shared region with the hypervisor. The region will be mapped...

DEBIAN-CVE-2020-15564

An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOPregistervcpuinfo. The hypercall VCPUOPregistervcpuinfo is used by a guest to register a shared region with the hypervisor. The region will be mapped...

PT-2020-5907 · Xen +2 · Xen +2

Name of the Vulnerable Software and Affected Versions: Xen versions through 4.13.x Description: An issue in Xen allows Arm guest OS users to cause a hypervisor crash due to a missing alignment check in the VCPUOP register vcpu info hypercall. This hypercall is used by a guest to register a shared...