CVE-2026-64247 KVM: x86: hyper-v: Bound the bank index when querying sparse banks

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: hyper-v: Bound the bank index when querying sparse banks When checking if a VP ID is included in a sparse bank set, explicitly check that the ID can actually be contained in a sparse bank the TLFS allows for a maximum o...

CVE-2026-64247

CVE-2026-64247 concerns the Linux kernel KVM code for x86 with hyper-v virtualization. The issue arises when checking if a VP ID is in a sparse bank set: the VP ID could be copied without bounds checking, risking an out-of-bounds read when testing the sparse bank and potentially triggering an unn...

kernel: KVM: x86: Check for invalid/obsolete root *after* making MMU pages available

A flaw was found in KVM in the Linux kernel. This vulnerability occurs due to improper validation of memory management unit MMU page roots after these pages are made available. An attacker could exploit this by triggering a scenario where KVM attempts to map memory into an invalid root, causing...

kernel: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O

A flaw was found in the Kernel-based Virtual Machine KVM for x86. This vulnerability occurs when KVM incorrectly re-checks Level 1 L1 intercepts during the completion of userspace I/O emulation for a Level 2 L2 instruction. If the L1 or host userspace modifies I/O interception settings during thi...

CVE-2026-49744

Kernel software installed and running inside a Guest VM may post improper commands to the GPU Firmware to trigger a write of data outside the Guest's virtualised GPU memory. Out of bounds accesses triggered by malware introduced to a Guest KMD could allow privilege escalation which escapes...

CVE-2026-49745

Kernel software installed and running inside a Guest VM may post improper commands to the GPU Firmware to trigger a write of data outside the Guest's virtualised GPU memory. Software installed and run under a Guest VM can send commands to the GPU which result in out of bounds memory accesses. The...

EUVD-2026-48534

Kernel software installed and running inside a Guest VM may post improper commands to the GPU Firmware to trigger a write of data outside the Guest's virtualised GPU memory. Software installed and run under a Guest VM can send commands to the GPU which result in out of bounds memory accesses. The...

CVE-2026-49745

Kernel software running within a Guest VM can exploit a vulnerability in the GPU DDK to send improper commands to the GPU Firmware . Specifically, an unvalidated sHWPerfCtlDMABuf GPU-VA allows for a DMA-write into FW privdata via MMU ctx 0 . This root cause results in out-of-bounds memory accesse...

CVE-2026-49745 GPU DDK - Unvalidated sHWPerfCtlDMABuf GPU-VA, DMA-write into FW privdata via MMU ctx 0

Kernel software installed and running inside a Guest VM may post improper commands to the GPU Firmware to trigger a write of data outside the Guest's virtualised GPU memory. Software installed and run under a Guest VM can send commands to the GPU which result in out of bounds memory accesses. The...

CVE-2026-49745

Kernel software installed and running inside a Guest VM may post improper commands to the GPU Firmware to trigger a write of data outside the Guest's virtualised GPU memory. Software installed and run under a Guest VM can send commands to the GPU which result in out of bounds memory accesses. The...

EUVD-2026-48533

Kernel software installed and running inside a Guest VM may post improper commands to the GPU Firmware to trigger a write of data outside the Guest's virtualised GPU memory. Out of bounds accesses triggered by malware introduced to a Guest KMD could allow privilege escalation which escapes...

CVE-2026-49744 GPU DDK - Unchecked ui32TracePointer in rgxfw_log_ex()

Kernel software installed and running inside a Guest VM may post improper commands to the GPU Firmware to trigger a write of data outside the Guest's virtualised GPU memory. Out of bounds accesses triggered by malware introduced to a Guest KMD could allow privilege escalation which escapes...

CVE-2026-49744

Kernel software installed and running inside a Guest VM may post improper commands to the GPU Firmware to trigger a write of data outside the Guest's virtualised GPU memory. Out of bounds accesses triggered by malware introduced to a Guest KMD could allow privilege escalation which escapes...

PT-2026-64362

Name of the Vulnerable Software and Affected Versions Linux kernel version 7.1.0-rc2 Description An issue exists in the KVM x86 hyper-v component where the bank index is not properly bounded when querying sparse banks. When handling a paravirtual TLB Translation Lookaside Buffer flush for L2, the...

PT-2026-64265

Kernel software installed and running inside a Guest VM may post improper commands to the GPU Firmware to trigger a write of data outside the Guest's virtualised GPU memory. Out of bounds accesses triggered by malware introduced to a Guest KMD could allow privilege escalation which escapes...

PT-2026-64266

Kernel software installed and running inside a Guest VM may post improper commands to the GPU Firmware to trigger a write of data outside the Guest's virtualised GPU memory. Software installed and run under a Guest VM can send commands to the GPU which result in out of bounds memory accesses. The...

Claude Cowork Flaw Could Let AI Agent Escape Its VM and Access Mac Files

Cybersecurity researchers have uncovered a sandbox escape vulnerability in Anthropic's Claude Cowork that makes it possible to break out of the confines of a Linux virtual machine VM within which the agent runs to read or write files anywhere on the Mac. Accomplish AI, which shared details of the...

kernel: VMCI: Fix use-after-free when removing resource in vmci_resource_remove()

A use-after-free vulnerability was found in the Linux kernel. When removing a resource from vmciresourcetable in vmciresourceremove, the search is performed using the resource handle by comparing context and resource fields. However, it is possible to create two resources with different types but...

kernel: net: sched: act_csum: validate nested VLAN headers

A flaw was found in the Linux kernel's network scheduler component. A remote attacker could send specially crafted network packets containing nested Virtual Local Area Network VLAN headers. This could cause the kernel to read beyond allocated memory, leading to a system crash and a denial of...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fixed a issue where shadow paging use-after-free occurred due to an unexpected role. Commit 0cb2af2ea66ad “KVM: x86: Fixed a issue where shadow paging use-after-free occurred due to an unexpected GFN” corrected a mismat...