CVE-2021-47255 kvm: LAPIC: Restore guard to prevent illegal APIC register access

In the Linux kernel, the following vulnerability has been resolved: kvm: LAPIC: Restore guard to prevent illegal APIC register access Per the SDM, "any access that touches bytes 4 through 15 of an APIC register may cause undefined behavior and must not be executed." Worse, such an access in...

CVE-2021-47255 kvm: LAPIC: Restore guard to prevent illegal APIC register access

In the Linux kernel, the following vulnerability has been resolved: kvm: LAPIC: Restore guard to prevent illegal APIC register access Per the SDM, "any access that touches bytes 4 through 15 of an APIC register may cause undefined behavior and must not be executed." Worse, such an access in...

CVE-2021-47255

In the Linux kernel, the following vulnerability has been resolved: kvm: LAPIC: Restore guard to prevent illegal APIC register access Per the SDM, "any access that touches bytes 4 through 15 of an APIC register may cause undefined behavior and must not be executed." Worse, such an access in...

CVE-2021-47255

In CVE-2021-47255, the Linux kernel vulnerability affects KVM LAPIC: a read access path in kvm_lapic_reg_read could touch bytes 4–15 of an APIC register, risking leakage of kernel stack contents. The issue was resolved by restoring a guard removed in a prior commit and aligning with the SDM requi...

CVE-2021-47230 KVM: x86: Immediately reset the MMU context when the SMM flag is cleared

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Immediately reset the MMU context when the SMM flag is cleared Immediately reset the MMU context when the vCPU's SMM flag is cleared so that the SMM flag in the MMU role is always synchronized with the vCPU's flag. If R...

CVE-2021-47230 KVM: x86: Immediately reset the MMU context when the SMM flag is cleared

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Immediately reset the MMU context when the SMM flag is cleared Immediately reset the MMU context when the vCPU's SMM flag is cleared so that the SMM flag in the MMU role is always synchronized with the vCPU's flag. If R...

CVE-2021-47230

CVE-2021-47230 affects the Linux kernel KVM on x86. The vulnerability arises from a lack of synchronization between the vCPU SMM flag and the MMU’s SMM flag, so that when RSM is not emulated correctly, KVM can bail out and leave the MMU in an inconsistent state. This misalignment can cause a NULL...

SUSE CVE-2024-35980

In the Linux kernel, the following vulnerability has been resolved: arm64: tlb: Fix TLBI RANGE operand KVM/arm64 relies on TLBI RANGE feature to flush TLBs when the dirty pages are collected by VMM and the page table entries become write protected during live migration. Unfortunately, the operand...

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 the kvmarchvcpuioctl vcpuload leak...

CVE-2024-35980

In the Linux kernel, the following vulnerability has been resolved: arm64: tlb: Fix TLBI RANGE operand KVM/arm64 relies on TLBI RANGE feature to flush TLBs when the dirty pages are collected by VMM and the page table entries become write protected during live migration. Unfortunately, the operand...

CVE-2024-35980

The CVE-2024-35980 issue affects the Linux kernel on arm64 when KVM is involved. The root cause is a TLBI RANGE operand sorting bug: the value passed to TLBI RANGE was not correctly derived during live migration, causing incomplete TLB flushing and potential crashes on the destination VM or misse...

CVE-2024-35980 arm64: tlb: Fix TLBI RANGE operand

In the Linux kernel, the following vulnerability has been resolved: arm64: tlb: Fix TLBI RANGE operand KVM/arm64 relies on TLBI RANGE feature to flush TLBs when the dirty pages are collected by VMM and the page table entries become write protected during live migration. Unfortunately, the operand...

CVE-2024-35980 arm64: tlb: Fix TLBI RANGE operand

In the Linux kernel, the following vulnerability has been resolved: arm64: tlb: Fix TLBI RANGE operand KVM/arm64 relies on TLBI RANGE feature to flush TLBs when the dirty pages are collected by VMM and the page table entries become write protected during live migration. Unfortunately, the operand...

CVE-2024-35804

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Mark target gfn of emulated atomic instruction as dirty When emulating an atomic access on behalf of the guest, mark the target gfn dirty if the CMPXCHG by KVM is attempted and doesn't fault. This fixes a bug where KVM...

CVE-2024-35791

A security vulnerability was identified in the Linux kernel's Kernel-based Virtual Machine subsystem KVM, specifically affecting the Secure Virtual Machine SVM feature used on AMD processors. The issue arises from a use-after-free condition in the svmregisterencregion function, which can lead to...

CVE-2024-35804

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Mark target gfn of emulated atomic instruction as dirty When emulating an atomic access on behalf of the guest, mark the target gfn dirty if the CMPXCHG by KVM is attempted and doesn't fault. This fixes a bug where KVM...

CVE-2024-35804

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Mark target gfn of emulated atomic instruction as dirty When emulating an atomic access on behalf of the guest, mark the target gfn dirty if the CMPXCHG by KVM is attempted and doesn't fault. This fixes a bug where KVM...

CVE-2024-35804 KVM: x86: Mark target gfn of emulated atomic instruction as dirty

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Mark target gfn of emulated atomic instruction as dirty When emulating an atomic access on behalf of the guest, mark the target gfn dirty if the CMPXCHG by KVM is attempted and doesn't fault. This fixes a bug where KVM...

CVE-2024-35804 KVM: x86: Mark target gfn of emulated atomic instruction as dirty

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Mark target gfn of emulated atomic instruction as dirty When emulating an atomic access on behalf of the guest, mark the target gfn dirty if the CMPXCHG by KVM is attempted and doesn't fault. This fixes a bug where KVM...

CVE-2024-35804

CVE-2024-35804 affects the Linux kernel KVM/x86 emulation: when CMPXCHG is attempted during a guest emulated atomic access, the target guest frame number (gfn) is marked dirty to prevent guest-memory corruption during live migration. A prior drop in dirty logging happened when the emulated CMPXCH...