CVE-2026-31558

Description

In the Linux kernel, the following vulnerability has been resolved: LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust kvm_get_vcpu_by_cpuid() takes a cpuid parameter whose type is int, so cpuid can be negative. Let kvm_get_vcpu_by_cpuid() return NULL for this case so as to make it more robust. This fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[].

References

https://git.kernel.org/stable/c/878cf6acb4fd8ab4126cf9d369a5bb0e23123418

https://git.kernel.org/stable/c/596c3f8069c4792f22fce8c4452f44410032d910

https://git.kernel.org/stable/c/47857b05bd50db01e211a1b6f513d57901cd3e6b

https://git.kernel.org/stable/c/2db06c15d8c7a0ccb6108524e16cd9163753f354

Details

Source: Mitre, NVD