CVE-2026-89913

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: vgic-v3: take an LPI reference in vgic_v3_save_pending_tables

vgic_v3_save_pending_tables() iterates dist->lpi_xa using xa_for_each()

and dereferences the returned struct vgic_irq in the loop body without

holding a reference on the LPI.

The xarray iterator only provides temporary RCU coverage while looking up

the current entry. That is not sufficient for this loop body, which reads

fields from struct vgic_irq and performs guest memory accesses before the

iteration completes.

A concurrent path can trigger this race: the irqfd cached injection path

(vgic_its_inject_cached_translation) obtains a transient LPI reference

via vgic_its_check_cache() without holding kvm->lock, vcpu->mutex,

config_lock, or its_lock. If guest ITS DISCARD then drops the cache and

ITE references under its_lock, the transient inject reference may become

the final one. When vgic_put_irq() drops it, the LPI is erased from

lpi_xa and f

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References