Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from the KVM module failing to properly handle the high 5 bits of the CR3 register when loading the PDPTEs of a...

SUSE CVE-2024-46830

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Acquire kvm-srcu when handling KVMSETVCPUEVENTS Grab kvm-srcu when processing KVMSETVCPUEVENTS, as KVM will forcibly leave nested VMX/SVM if SMM mode is being toggled, and leaving nested VMX reads guest memory. Note,...

CVE-2024-46830

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Acquire kvm-srcu when handling KVMSETVCPUEVENTS Grab kvm-srcu when processing KVMSETVCPUEVENTS, as KVM will forcibly leave nested VMX/SVM if SMM mode is being toggled, and leaving nested VMX reads guest memory. Note,...

DEBIAN-CVE-2024-46830

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Acquire kvm-srcu when handling KVMSETVCPUEVENTS Grab kvm-srcu when processing KVMSETVCPUEVENTS, as KVM will forcibly leave nested VMX/SVM if SMM mode is being toggled, and leaving nested VMX reads guest memory. Note,...

UBUNTU-CVE-2024-46830

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Acquire kvm-srcu when handling KVMSETVCPUEVENTS Grab kvm-srcu when processing KVMSETVCPUEVENTS, as KVM will forcibly leave nested VMX/SVM if SMM mode is being toggled, and leaving nested VMX reads guest memory. Note,...

ROS-20240925-01

A vulnerability in the max3100 component of the Linux kernel is related to NULL pointer dereferencing. Exploitation of the vulnerability could allow an attacker to cause a denial of service Vulnerability in the afalg component of the Linux kernel is related to NULL pointer dereferencing...

The vulnerability of the nested_svm_load_cr3() function in the nSVM component of the Linux operating system allows a hacker to cause a service failure.

The vulnerability of the nestedsvmloadcr3 function in the nSVM component of the Linux operating system is related to the assignment of NULL during an embedded migration. Exploiting this vulnerability can allow an attacker to cause a service failure...

PT-2024-32233

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.10.0-rc7-332d2c1d713e-next-vm 552 Description The issue is related to the KVM Kernel-based Virtual Machine component in the Linux kernel. Specifically, it involves the handling of KVM SET VCPU EVENTS, where KVM...

SUSE CVE-2022-48793

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: nSVM: fix potential NULL derefernce on nested migration Turns out that due to review feedback and/or rebases I accidentally moved the call to nestedsvmloadcr3 to be too early, before the NPT is enabled, which is very...

SUSE CVE-2022-48763

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Forcibly leave nested virt when SMM state is toggled Forcibly leave nested virtualization operation if userspace toggles SMM state via KVMSETVCPUEVENTS or KVMSYNCX86EVENTS. If userspace forces the vCPU out of SMM while...

CVE-2022-48763

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Forcibly leave nested virt when SMM state is toggled Forcibly leave nested virtualization operation if userspace toggles SMM state via KVMSETVCPUEVENTS or KVMSYNCX86EVENTS. If userspace forces the vCPU out of SMM while...

DEBIAN-CVE-2022-48763

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Forcibly leave nested virt when SMM state is toggled Forcibly leave nested virtualization operation if userspace toggles SMM state via KVMSETVCPUEVENTS or KVMSYNCX86EVENTS. If userspace forces the vCPU out of SMM while...

Linux kernel security vulnerabilities

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from a forced departure from the nested virtualizer when the KVM:x86 module switches SMM states...

CVE-2022-48763

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Forcibly leave nested virt when SMM state is toggled Forcibly leave nested virtualization operation if userspace toggles SMM state via KVMSETVCPUEVENTS or KVMSYNCX86EVENTS. If userspace forces the vCPU out of SMM while...

Important: kernel

Issue Overview: An issue was discovered in arch/x86/kvm/vmx/nested.c in the Linux kernel before 6.2.8. nVMX on x8664 lacks consistency checks for CR0 and CR4. CVE-2023-30456 In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix invalid address access in lookuprec when...

kernel: Linux kernel KVM: Denial of Service in nested SVM due to TSC multiplier manipulation

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM nested SVM nSVM module. A local attacker with low privileges in a nested virtual machine can manipulate the Timestamp Counter TSC multiplier and CPUID features. This manipulation can trigger a kernel warning, leading to a...

kernel: KVM: nSVM: Check instead of asserting on nested TSC scaling support

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...

kernel: KVM: x86/mmu: race condition in direct_page_fault()

A flaw was found in the Linux kernel in the KVM. A race condition in directpagefault allows guest OS users to cause a denial of service host OS crash or host OS memory corruption when nested virtualization and the TDP MMU are enabled...

kernel: KVM: nVMX: missing consistency checks for CR0 and CR4

A flaw was found in the KVM's Intel nested virtualization feature nVMX. The effective values of the guest CR0 and CR4 registers could differ from those included in the VMCS12. In rare circumstances i.e., kvmintel module loaded with parameters nested=1 and ept=0 this could allow a malicious guest ...

kernel: KVM: x86/mmu: race condition in direct_page_fault()

A flaw was found in the Linux kernel in the KVM. A race condition in directpagefault allows guest OS users to cause a denial of service host OS crash or host OS memory corruption when nested virtualization and the TDP MMU are enabled...