PT-2026-5018

Name of the Vulnerable Software and Affected Versions Xen affected versions not specified Description The issue relates to the context switch logic within Xen. Specifically, Xen attempts to skip an IBPB Instruction Barrier Page Base when a virtual CPU vCPU returns to a CPU it previously ran on...

SUSE CVE-2023-54296

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Get source vCPUs from source VM for SEV-ES intrahost migration Fix a goof where KVM tries to grab source vCPUs from the destination VM when doing intrahost migration. Grabbing the wrong vCPU not only hoses the guest, it...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-993214)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-993214 advisory. In the Linux kernel, the following vulnerability has been resolved: arm64: acpi: Harden getcpuforacpiid against missing CPU entry In a review discussion of the chang...

kernel: KVM: SVM: Don't BUG if userspace injects an interrupt with GIF=0

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Don't BUG if userspace injects an interrupt with GIF=0 Don't BUG/WARN on interrupt injection due to GIF being cleared, since it's trivial for userspace to force the situation via KVMSETVCPUEVENTS even if having at least...

kernel: KVM: Explicitly verify target vCPU is online in kvm_get_vcpu()

In the Linux kernel, the following vulnerability has been resolved: KVM: Explicitly verify target vCPU is online in kvmgetvcpu Explicitly verify the target vCPU is fully online prior to clamping the index in kvmgetvcpu. If the index is "bad", the nospec clamping will generate '0', i.e. KVM will...

CVE-2025-58148

A flaw was found in Xen. Hypercalls using any input format can cause sendipi to read d-vcpu out-of-bounds, and operate on a wild vCPU pointer. A buggy or malicious guest can cause Denial of Service DoS affecting the entire host, information leaks, or elevation of privilege...

CVE-2025-58147

A flaw was found in Xen. Hypercalls using the HVVPSET Sparse format can cause vpmaskset to write out of bounds when converting the bitmap to Xen's format. A buggy or malicious guest can cause Denial of Service DoS affecting the entire host, information leaks, or elevation of privilege...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Reject SEV-ES intra-host migration if vCPU creation is in progress Migrations of SEV-ES state are rejected if either the source or destination VM is actively creating a vCPU. This occurs when the kvmvmioctlcreatevcpu...

EUVD-2025-37345

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in one of three formats. Xen has boundary checking bugs with all three formats, which can cause...

ALPINE-CVE-2025-58147

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in one of three formats. Xen has boundary checking bugs with all three formats, which can cause...

CVE-2025-58147

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in one of three formats. Xen has boundary checking bugs with all three formats, which can cause...

CVE-2025-58147

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in one of three formats. Xen has boundary checking bugs with all three formats, which can cause...

CVE-2025-58147

The Xen hypervisor contains an out-of-bounds write vulnerability in the Viridian interface. Specifically, incorrect input sanitization during Viridian hypercalls using the HV_VP_SET Sparse format can cause the vpmask_set() function to write outside of intended memory boundaries. Exploitation of t...

CVE-2025-58148

The Xen hypervisor contains a vulnerability in the Viridian interface where incorrect input sanitization during hypercalls can lead to an out-of-bounds read through the send_ipi() function. This occurs when processing any of the three supported input formats for specifying a mask of vCPU IDs, pot...

CVE-2025-58148

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in one of three formats. Xen has boundary checking bugs with all three formats, which can cause...

CVE-2025-58148 x86: Incorrect input sanitisation in Viridian hypercalls

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in one of three formats. Xen has boundary checking bugs with all three formats, which can cause...

KVM: arm64: Prevent access to vCPU events before init

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SUSE CVE-2025-40102

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Prevent access to vCPU events before init Another day, another syzkaller bug. KVM erroneously allows userspace to pend vCPU events for a vCPU that hasn't been initialized yet, leading to KVM interpreting a bunch of...

EUVD-2025-36976

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Prevent access to vCPU events before init Another day, another syzkaller bug. KVM erroneously allows userspace to pend vCPU events for a vCPU that hasn't been initialized yet, leading to KVM interpreting a bunch of...

CVE-2025-40102

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Prevent access to vCPU events before init Another day, another syzkaller bug. KVM erroneously allows userspace to pend vCPU events for a vCPU that hasn't been initialized yet, leading to KVM interpreting a bunch of...