CVE-2026-64462

/// Technical description

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

PCI: altera: Fix resource leaks on probe failure

The chained IRQ handler is set during probe, but is only removed during the

driver remove(). If pci_host_probe() fails, the handler and INTx IRQ

domain remain set even though the devm-managed host bridge storage

containing struct altera_pcie will be released, leaving the handler with

a stale data pointer.

Interrupts are also enabled before pci_host_probe() is called. If probe

fails after that point, the controller interrupt source should be disabled

before the chained handler and INTx domain are removed.

So set the chained handler only after the INTx domain has been created.

Disable controller interrupts during IRQ teardown, and tear the IRQ setup

down if pci_host_probe() fails.

[mani: commit log]

/// 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