CVE-2026-31558 PUBLISHED

LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust

Assigner: Linux
Reserved: 09.03.2026 Published: 24.04.2026 Updated: 24.04.2026

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[].

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 73516e9da512adc63ba3859fbd82a21f6257348f to 596c3f8069c4792f22fce8c4452f44410032d910 (excl.)
  • affected from 73516e9da512adc63ba3859fbd82a21f6257348f to 878cf6acb4fd8ab4126cf9d369a5bb0e23123418 (excl.)
  • affected from 73516e9da512adc63ba3859fbd82a21f6257348f to 47857b05bd50db01e211a1b6f513d57901cd3e6b (excl.)
  • affected from 73516e9da512adc63ba3859fbd82a21f6257348f to 2db06c15d8c7a0ccb6108524e16cd9163753f354 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.10 is affected
  • unaffected from 0 to 6.10 (excl.)
  • unaffected from 6.12.80 to 6.12.* (incl.)
  • unaffected from 6.18.21 to 6.18.* (incl.)
  • unaffected from 6.19.11 to 6.19.* (incl.)
  • unaffected from 7.0 to * (incl.)

References