CVE-2026-89751

A flaw was found in the Linux kernel's x86/tdx component. An off-by-one error in the handlein and handleout functions, specifically in the GENMASK calculation for port I/O operations, causes the mask to be one bit too wide. This incorrect handling of I/O sizes could potentially lead to unintended...

Linux x86 Kernel Heap Buffer Overflow DoS

The vulnerability of the fpuclearuserstates function in the arch/x86/kernel/fpu/core.c module of the Linux operating system’s x86 kernel support module is related to the improper shutdown or release of resources. Exploiting this vulnerability could allow an attacker to cause a service failure...

Linux KVM Xen Buffer Overflow DoS

The vulnerability of the kvmxeninitvcpu function in the arch/x86/kvm/xen.c module of the virtualization subsystem on the x86-based Linux kernel platform is related to improper initialization. Exploiting this vulnerability can allow an attacker to cause a service failure...

Linux KVM SVM svm_vcpu_pre_run Buffer Overflow

The vulnerability of the svmvcpuprerun function in the arch/x86/kvm/svm/svm.c module of the virtualization subsystem on the Linux kernel-based x86 platform is related to insufficient checking of exception states. Exploiting this vulnerability could allow an attacker to compromise the...

CVE-2025-38071 x86/mm: Check return value from memblock_phys_alloc_range()

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Check return value from memblockphysallocrange At least with CONFIGPHYSICALSTART=0x100000, if there is 4 MiB of contiguous free memory available at this point, the kernel will crash and burn because memblockphysallocrange...

kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests

It was found that paravirtpatchcall/jump functions in the arch/x86/kernel/paravirt.c in the Linux kernel mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtualized guests...