CVE-2025-22128

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

wifi: ath12k: Clear affinity hint before calling ath12k_pci_free_irq() in error path

If a shared IRQ is used by the driver due to platform limitation, then the IRQ affinity hint is set right after the allocation of IRQ vectors in ath12k_pci_msi_alloc(). This does no harm unless one of the functions requesting the IRQ fails and attempt to free the IRQ.

This may end up with a warning from the IRQ core that is expecting the affinity hint to be cleared before freeing the IRQ:

kernel/irq/manage.c:

/* make sure affinity_hint is cleaned up */
if (WARN_ON_ONCE(desc->affinity_hint))
	desc->affinity_hint = NULL;

So to fix this issue, clear the IRQ affinity hint before calling ath12k_pci_free_irq() in the error path. The affinity will be cleared once again further down the error path due to code organization, but that does no harm.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.