kernel: KVM: VMX: Bury Intel PT virtualization (guest/host mode) behind CONFIG_BROKEN

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM subsystem. In guest/host mode for Intel Processor Trace Intel PT, the hypervisor fails to properly validate virtual processor configurations and manage tracing states during virtual machine transitions. A local user or guest...

UBUNTU-CVE-2025-38055

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel: Fix segfault with PEBS-via-PT with samplefreq Currently, using PEBS-via-PT with a sample frequency instead of a sample period, causes a segfault. For example: BUG: kernel NULL pointer dereference, address:...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Disabling Intel PT virtualization guest/host mode is enabled by default under CONFIGBROKEN. This means that KVM’s ptmode module parameter is set to BROKEN by default, thereby disabling support for virtualizing Intel PT...