kernel: KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM x86 memory management unit MMU. A malicious guest operating system could create a hugepage mapping that extends beyond the boundaries of its allocated memory slot. This improper handling of memory boundaries by KVM can lead t...

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...

Linux Distros Unpatched Vulnerability : CVE-2026-63807

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level When recovering hugepages in the shadow MMU, verify that the base gfn of the shado...

EUVD-2026-45473

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level When recovering hugepages in the shadow MMU, verify that the base gfn of the shadow page is actually contained within the target memslot, before queryi...

UBUNTU-CVE-2026-53359

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix shadow paging use-after-free due to unexpected role Commit 0cb2af2ea66ad "KVM: x86: Fix shadow paging use-after-free due to unexpected GFN" fixed a shadow paging mismatch between stored and computed GFNs; the bug...

CVE-2026-53359 KVM: x86: Fix shadow paging use-after-free due to unexpected role

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix shadow paging use-after-free due to unexpected role Commit 0cb2af2ea66ad "KVM: x86: Fix shadow paging use-after-free due to unexpected GFN" fixed a shadow paging mismatch between stored and computed GFNs; the bug...

CVE-2026-53277

A flaw was found in the Kernel-based Virtual Machine KVM component of the Linux kernel on arm64 architectures. This vulnerability occurs because certain page table walk operations, used in fault injection and Address Translation AT emulation, do not properly acquire a Sleepable Read-Copy Update...

SUSE CVE-2026-52969

In the Linux kernel, the following vulnerability has been resolved: KVM: Reject wrapped offset in kvmresetdirtygfn kvmresetdirtygfn guards the gfn range with if !memslot || offset + flsmask = memslot-npages return; but offset is u64 and the addition is unchecked. The check can be silently bypasse...

CVE-2026-53277 KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation walks1 and kvmwalknesteds2 expect to be called while holding kvm-srcu to guard against memslot changes. While this is generally the case,...

CVE-2026-52969

CVE-2026-52969 affects the Linux kernel KVM component. The vulnerability stems from an unchecked u64 addition in kvm_reset_dirty_gfn(), where the guard if (!memslot || (offset + __fls(mask)) >= memslot->npages) can be bypassed due to offset being 64‑bit. This can allow an out-of-bounds load...

PT-2026-51863

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An integer overflow exists in the kvm reset dirty gfn function within the Kernel-based Virtual Machine KVM component. A local attacker with access to /dev/kvm can manipulate dirty ring...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: x86: Do not overflow the lpageinfo array when checking attributes The issue was fixed by preventing KVMSETMEMORYATTRIBUTES from overflowing the lpageinfo array and triggering KASAN errors, as observed in the...

PT-2026-37554

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM x86 component where reading PDPTR registers in the get sregs2 function lacks proper SRCU read-side protection. Reading PDPTRs can trigger access to guest memor...

CVE-2025-68810 KVM: Disallow toggling KVM_MEM_GUEST_MEMFD on an existing memslot

In the Linux kernel, the following vulnerability has been resolved: KVM: Disallow toggling KVMMEMGUESTMEMFD on an existing memslot Reject attempts to disable KVMMEMGUESTMEMFD on a memslot that was initially created with a guestmemfd binding, as KVM doesn't support toggling KVMMEMGUESTMEMFD on...

CVE-2025-68810

In the Linux kernel, the following vulnerability has been resolved: KVM: Disallow toggling KVMMEMGUESTMEMFD on an existing memslot Reject attempts to disable KVMMEMGUESTMEMFD on a memslot that was initially created with a guestmemfd binding, as KVM doesn't support toggling KVMMEMGUESTMEMFD on...

CVE-2025-68810 KVM: Disallow toggling KVM_MEM_GUEST_MEMFD on an existing memslot

In the Linux kernel, the following vulnerability has been resolved: KVM: Disallow toggling KVMMEMGUESTMEMFD on an existing memslot Reject attempts to disable KVMMEMGUESTMEMFD on a memslot that was initially created with a guestmemfd binding, as KVM doesn't support toggling KVMMEMGUESTMEMFD on...

PT-2026-2542

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.18.0-rc6-115d5de2eef3-next-kasan Description The Linux kernel contains a flaw within the KVM subsystem. Specifically, it fails to prevent disabling the KVM MEM GUEST MEMFD flag on a memslot that was initially...

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 allowing the KVMMEMGUESTMEMFD flag to be cleared on an existing memory slot, potentially leading to reuse...

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 KVM guestmemfd not properly removing memory slot bindings, which could lead to reuse after release...

Unity Linux 20.1070e Security Update: kernel (UTSA-2025-986276)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-986276 advisory. In the Linux kernel, the following vulnerability has been resolved: kvm: avoid speculation-based attacks from out-of-range memslot accesses KVM's mechanism for...