CVE-2026-93072

/// Technical description

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

irqchip/renesas-irqc: Fix generic interrupt chip leak on remove

The driver allocates domain generic chips probe. However, on driver

removal, the generic chips are not automatically freed when the interrupt

domain is removed because the domain flags do not include

IRQ_DOMAIN_FLAG_DESTROY_GC.

This causes both the domain generic chips structure and the associated

generic chips to be leaked. Additionally, the generic chips remain on the

global list and may later be accessed by generic interrupt chip suspend,

resume, or shutdown callbacks after the driver has been removed,

potentially resulting in a use-after-free and kernel crash.

Fix the resource leak by setting IRQ_DOMAIN_FLAG_DESTROY_GC on the

interrupt domain; this lets the interrupt domain core automatically

release all generic chips when irq_domain_remove() is invoked, removing

the need for manual cleanup calls in error paths and remove callback.

/// 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