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High severity8.8NVD Advisory· Published Apr 24, 2026· Updated Apr 27, 2026

CVE-2026-31558

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[].

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

10
  • Linux/Kernel10 versions
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 9 more
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=6.10.1,<6.12.80
    • cpe:2.3:o:linux:linux_kernel:6.10:-:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
    • cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
    • (no CPE)

Patches

Vulnerability mechanics

References

4

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