CVE-2026-72289

Technical Description

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

KVM: arm64: vgic: Check the interrupt is still ours before migrating it

vgic_prune_ap_list() drops both ap_list_lock and irq_lock while migrating

an interrupt to another vCPU. After reacquiring the locks it only checks

that the affinity is unchanged (target_vcpu == vgic_target_oracle(irq))

before moving the interrupt, which assumes that an interrupt whose affinity

is preserved is still queued on this vCPU's ap_list.

That assumption no longer holds if the interrupt is taken off the ap_list

while the locks are dropped. vgic_flush_pending_lpis() removes the

interrupt from the list and sets irq->vcpu to NULL, but leaves

enabled/pending/target_vcpu untouched. As the interrupt is still enabled

and pending, vgic_target_oracle() returns the same target_vcpu, so the

affinity check passes and list_del() is run a second time on an entry that

has already been removed.

Also check that the interrupt is still assigned to this vCP

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