Vulnerability 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[].
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.10.1, < 6.12.80 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/2db06c15d8c7a0ccb6108524e16cd9163753f354Patch
- https://git.kernel.org/stable/c/47857b05bd50db01e211a1b6f513d57901cd3e6bPatch
- https://git.kernel.org/stable/c/596c3f8069c4792f22fce8c4452f44410032d910Patch
- https://git.kernel.org/stable/c/878cf6acb4fd8ab4126cf9d369a5bb0e23123418Patch
FAQ
What is CVE-2026-31558?
CVE-2026-31558 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 cpu...
How severe is CVE-2026-31558?
CVE-2026-31558 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31558?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.