CVE-2026-31558
highpriority · track · 0EPSS 0.001 · 2 %ileDEEURUUSEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (35)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-1279Linux Kernel: Mehrere SchwachstellenDeutsch2026-04-26csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um nicht näher spezifizierte Angriffe durchzuführen, welche zu einem Denial-of-Service-Zustand, einer Rechteausweitung, der Ausführung von Code oder einer Speicherbeschädigung führen könnten.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (11)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2026-31558cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2026-31558cnnvd
- https://www.kernel.org/Patchcnnvd
- https://git.kernel.org/stable/c/2db06c15d8c7a0ccb6108524e16cd9163753f354enisa_euvd
- https://git.kernel.org/stable/c/47857b05bd50db01e211a1b6f513d57901cd3e6benisa_euvd
- https://git.kernel.org/stable/c/596c3f8069c4792f22fce8c4452f44410032d910enisa_euvd
- https://git.kernel.org/stable/c/878cf6acb4fd8ab4126cf9d369a5bb0e23123418enisa_euvd
- https://git.kernel.org/stable/c/2db06c15d8c7a0ccb6108524e16cd9163753f354Patchnvd
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