CVE-2026-72384

/// Technical description

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

irqchip/ts4800: Fix missing chained handler cleanup on remove

The driver installs a chained handler for the parent interrupt during probe

using irq_set_chained_handler_and_data(), but the remove function does not

clear this handler. This leaves a dangling handler that may be called when

the parent interrupt fires after the driver has been removed, potentially

accessing freed memory and causing a kernel crash.

Additionally, the parent_irq obtained via irq_of_parse_and_map() is not

stored, making it inaccessible in the remove function. Moreover, interrupt

mappings created during probe are not properly disposed.

Fix this by:

- Saving parent_irq in probe

- Clearing the chained handler with NULL in ts4800_ic_remove()

- Disposing all IRQ mappings before domain removal to prevent resource

leaks

/// 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