CVE-2026-64105 Linux CVE debrief

Who should care

Users of Linux kernel with KVM: arm64: vgic enabled should be aware of this vulnerability and review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Operators managing Linux kernel systems using KVM: arm64: vgic should identify affected product deployments in managed environments and assign an owner for follow-up.

Technical summary

The vulnerability is related to the KVM: arm64: vgic component of the Linux kernel. It involves a failure in freeing private_irqs when initialization fails after allocation. This issue may impact operators managing Linux kernel systems using KVM: arm64: vgic. Affected product deployments should be identified in managed environments and assigned an owner for follow-up. The issue requires freeing private_irqs when kvm_vgic_vcpu_init() fails so private IRQs allocated before a redistributor iodev registration failure are released before the failed vCPU is freed. Users of Linux kernel with KVM: arm64: vgic enabled should review official advisories for affected scope, severity, and vendor guidance.

Defensive priority

Medium

Recommended defensive actions

• Inventory Linux kernel systems using KVM: arm64: vgic
• Apply vendor patches or updates
• Monitor for unusual activity
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

Evidence is limited; verify with official records. The CVE record was published on 2026-07-19T16:17:51.780Z and has not been modified since then. Limited source detail is available; defensive verification tasks are recommended.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.