What’s Vulnerable › Vulnerabilities

CVE-2026-98712: KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq Referencing the last interrupt inserted in an LR is rather fragile, as this interrupt can vanish if a concurrently unmapped LPI. Solve this by bumping up the refcount on the interrupt when populating last_lr_irq, and drop it at vgic_prune_ap_list() time, when LPIs are being reclaimed.

Affected products

• Linux kernel: from 6.19.9 before 6.20; 7.0 — fixed in 6.20, 7.3

How to fix

Upgrade to a fixed version: Linux kernel 6.20, 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/19bc5d79ece613f242b5ec03921a3b465321bfed
• https://git.kernel.org/stable/c/8b25393d16a5ca8df907bd7ee1ff2e9d85678b3c

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