kernel: KVM: SVM: Get source vCPUs from source VM for SEV-ES intrahost migration

A flaw was found in the Linux kernel's KVM SVM implementation for AMD SEV-ES. During intrahost VM migration, KVM incorrectly retrieves source vCPUs from the destination VM instead of the source VM. This causes the VMSA Virtual Machine Save Area pointer to remain NULL, leading to a host kernel cra...

UBUNTU-CVE-2024-53196

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Don't retire aborted MMIO instruction Returning an abort to the guest for an unsupported MMIO access is a documented feature of the KVM UAPI. Nevertheless, it's clear that this plumbing has seen limited testing, since...

CLSA-2024-1727816710 Fix of 60 CVEs

CVE-url: https://ubuntu.com/security/CVE-2024-26752 - l2tp: pass correct message length to ip6appenddata CVE-url: https://ubuntu.com/security/CVE-2023-52527 - ipv4, ipv6: Fix handling of transhdrlen in ip,6appenddata CVE-url: https://ubuntu.com/security/CVE-2024-43882 - exec: Fix ToCToU between...

OESA-2024-1353 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Don't advance iterator after restart due to yielding After dropping mmulock in the TDP MMU, restart the iterator during tdpiternext and do not...

DEBIAN-CVE-2023-34328

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. AMD CPUs since 2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of...

PT-2025-54142

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.5.0-smp--fff2e47e6c3b-next 151 Description The Linux kernel contains a flaw within the KVM component related to SEV-ES intrahost migration. A mistake in the code causes KVM to attempt to retrieve source vCPUs...

SUSE CVE-2013-6376

The recalculateapicmap function in arch/x86/kvm/lapic.c in the KVM subsystem in the Linux kernel through 3.12.5 allows guest OS users to cause a denial of service host OS crash via a crafted ICR write operation in x2apic mode...

SUSE CVE-2017-12154

The preparevmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write...

kernel: KVM: cmpxchg_gpte can write to pfns outside the userspace region

A flaw was found in KVM. When updating a guest's page table entry, vmpgoff was improperly used as the offset to get the page's pfn. As vaddr and vmpgoff are controllable by user-mode processes, this flaw allows unprivileged local users on the host to write outside the userspace region and...

CVE-2021-26324

A bug with the SEV-ES TMR may lead to a potential loss of memory integrity for SNP-active VMs...

kernel: kvm: vmx: host GDT limit corruption

A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cp...

kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set

The KVM subsystem in the Linux kernel before 3.6.9, when running on hosts that use qemu userspace without XSAVE, allows local users to cause a denial of service kernel OOPS by using the KVMSETSREGS ioctl to set the X86CR4OSXSAVE bit in the guest cr4 register, then calling the KVMRUN ioctl...

KVM: Check cpl before emulating debug register access

The handledr function in arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 2.6.31.1 does not properly verify the Current Privilege Level CPL before accessing a debug register, which allows guest OS users to cause a denial of service trap on the host OS via a crafted application...

kernel: KVM: x86 emulator: limit instructions to 15 bytes

The doinsnfetch function in arch/x86/kvm/emulate.c in the x86 emulator in the KVM subsystem in the Linux kernel before 2.6.32-rc8-next-20091125 tries to interpret instructions that contain too many bytes to be valid, which allows guest OS users to cause a denial of service increased scheduling...