KVM: VMX: Prevent RSB underflow before vmenter

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KVM: x86: Use __try_cmpxchg_user() to update guest PTE A/D bits

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The vulnerability of the KVM kernel component in the Linux operating system allows a hacker to trigger a service failure.

The vulnerability of the Linux operating system’s KVM kernel component is related to the state of the gmapshadow and acquiregmapshadow functions. Exploiting this vulnerability can allow an attacker to gain increased privileges within the system...

ROS-20251021-02

A vulnerability in the btrfs component of the Linux operating system kernel is related to an incorrect lock in the function clearextentuptodate in fs/btrfs/inode.c. Exploitation of the vulnerability could allow an attacker to cause a denial of service A vulnerability in the KVM component of the...

Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987649)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-987649 advisory. In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: fix panic on out-of-bounds guest IRQ As guestirq is coming from KVMIRQFD API call, it m...

kernel: KVM: x86/hyper-v: Skip non-canonical addresses during PV TLB flush

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/hyper-v: Skip non-canonical addresses during PV TLB flush In KVM guests with Hyper-V hypercalls enabled, the hypercalls HVCALLFLUSHVIRTUALADDRESSLIST and HVCALLFLUSHVIRTUALADDRESSLISTEX allow a guest to request...

kernel-rt security update

An update is available for kernel-rt. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The kernel-rt packages provide the Real Time Linux Kernel, which enables...

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...

KVM: arm64: Don't retire aborted MMIO instruction

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CVE-2023-53663

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Check instead of asserting on nested TSC scaling support Check for nested TSC scaling support on nested SVM VMRUN instead of asserting that TSC scaling is exposed to L1 if L1's MSRAMD64TSCRATIO has diverged from KVM's...

CVE-2023-53663

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Check instead of asserting on nested TSC scaling support Check for nested TSC scaling support on nested SVM VMRUN instead of asserting that TSC scaling is exposed to L1 if L1's MSRAMD64TSCRATIO has diverged from KVM's...

CVE-2023-53663

CVE-2023-53663 concerns the Linux kernel KVM nSVM nested-VM path. The issue occurs when nested TSC scaling support is checked on nested SVM VMRUN and an MSR write together with a guest CPUID update hides the feature, causing the guest to trigger a WARN repeatedly (sequence shown) instead of a cor...

Qemu-kvm: vnc websocket handshake use-after-free

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EUVD-2013-4055

Malware in sbrugna...

CVE-2023-53319

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Handle kvmarminit failure correctly in finalizepkvm Currently there is no synchronisation between finalizepkvm and kvmarminit initcalls. The finalizepkvm proceeds happily even if kvmarminit fails resulting in the...

CVE-2023-53208 KVM: nSVM: Load L1's TSC multiplier based on L1 state, not L2 state

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Load L1's TSC multiplier based on L1 state, not L2 state When emulating nested VM-Exit, load L1's TSC multiplier if L1's desired ratio doesn't match the current ratio, not if the ratio L1 is using for L2 diverges from...

Branch Predictor Isolation in KVM-QEMU

Summary Researchers claim new KVM-QEMU primitives allow exploitation of Spectre V2 resulting in information leakage in various cloud scenarios. KVM-QEMU is a combination of KVM Kernel-based Virtual Machine, a Linux kernel module that enables hardware-assisted virtualization and Quick Emulator QEM...

DEBIAN-CVE-2025-39704

In the Linux kernel, the following vulnerability has been resolved: LoongArch: KVM: Fix stack protector issue in sendipidata Function kvmiobusread is called in function sendipidata, buffer size of parameter val should be at least 8 bytes. Since some emulation functions like loongarchipireadl and...

CVE-2025-39704

The provided connected documents confirm CVE-2025-39704 affects LoongArch KVM in the Linux kernel, where send_ipi_data() calls kvm_io_bus_read() and may write an 8-byte signed extension into *val regardless of the given length. This can cause a buffer overflow when CONFIG_STACKPROTECTOR is enable...

PT-2025-36298

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 6.17.0-rc1+ 102 Description: A stack buffer overflow issue exists in the send ipi data function within the Linux kernel, specifically related to the LoongArch architecture and KVM functionality. The kvm io bus...