High 8.8Published Apr 24, 2026

CVE-2026-31558LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust

Updated under an hour ago (Oct 28, 2026, 1:50 AM ET)

Does this affect you?

It affects Linux and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	73516e9da512adc63ba3859fbd82a21f6257348f builds before 596c3f8069c4792f22fce8c4452f44410032d910; 73516e9da512adc63ba3859fbd82a21f6257348f builds before 878cf6acb4fd8ab4126cf9d369a5bb0e23123418; 73516e9da512adc63ba3859fbd82a21f6257348f builds before 47857b05bd50db01e211a1b6f513d57901cd3e6b; 73516e9da512adc63ba3859fbd82a21f6257348f builds before 2db06c15d8c7a0ccb6108524e16cd9163753f354	CNA record
linux linux_kernel linux:linux_kernel	from 6.10.1 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 6.10; 7.0; 7.0; 7.0; 7.0; and 3 more ranges	NVD

References

References

https://git.kernel.org/stable/c/596c3f8069c4792f22fce8c4452f44410032d910	patch
https://git.kernel.org/stable/c/878cf6acb4fd8ab4126cf9d369a5bb0e23123418	patch
https://git.kernel.org/stable/c/47857b05bd50db01e211a1b6f513d57901cd3e6b	patch
https://git.kernel.org/stable/c/2db06c15d8c7a0ccb6108524e16cd9163753f354	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.