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...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the fact that the VMLOAD/VMSAVE emulation in KVM nSVM does not always utilize vmcb01, potentially...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-001476)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001476 advisory. A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by t...

EUVD-2020-17429

Malware in sbrugna...

EUVD-2021-26951

Malware in sbrugna...

EUVD-2021-13148

Malware in sbrugna...

EUVD-2021-26949

Malware in sbrugna...

Rocky Linux 8 : kernel (RLSA-2021:3548)

The remote Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2021:3548 advisory. - A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provide...

K11546763: Linux kernel vulnerability CVE-2021-3653

Security Advisory Description A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "intctl" field, this...

K80212034: Linux kernel vulnerability CVE-2021-3656

Security Advisory Description A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "virtext" field, this...

SUSE CVE-2021-29657

arch/x86/kvm/svm/nested.c in the Linux kernel before 5.11.12 has a use-after-free in which an AMD KVM guest can bypass access control on host OS MSRs when there are nested guests, aka CID-a58d9166a756. This occurs because of a TOCTOU race condition associated with a VMCB12 double fetch in...

CVE-2021-26342

In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer TLB following a particular sequence of operations that includes creation of a new virtual machine control block VMCB. The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for...

CVE-2021-26342: Undefined Security Weakness

In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer TLB following a particular sequence of operations that includes creation of a new virtual machine control block VMCB. The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for...

Amazon Linux 2 : kernel (ALASKERNEL-5.10-2022-005)

The version of kernel installed on the remote host is prior to 5.10.62-55.141. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2022-005 advisory. A flaw was found in the Linux kernel's implementation of wireless drivers using the Atheros chipsets. An...

CVE-2021-3656

A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "virtext" field, this issue could allow a malicious...

CVE-2021-3656

A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "virtext" field, this issue could allow a malicious...

Input validation

A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "virtext" field, this issue could allow a malicious...

CVE-2021-3656

A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "virtext" field, this issue could allow a malicious...

CVE-2021-3656

CVE-2021-3656 describes a flaw in the KVM hypervisor for AMD processors where the L1 guest can provide a VMCB with an improperly validated virt_ext field, allowing the L1 to disable VMLOAD/VMSAVE intercepts and VLS for the L2 guest. This enables the L2 guest to read/write portions of the host’s p...

CVE-2021-3656: Missing Authorization

A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "virtext" field, this issue could allow a malicious...