CVE-2026-53226

Summary

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

gpio: rockchip: fix generic IRQ chip leak on remove

The driver allocates domain generic chips using irq_alloc_domain_generic_chips() during probe. However, on driver remove/teardown, the generic chips are not automatically freed when the IRQ 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 gc_list and may later be visited by generic IRQ chip suspend, resume, or shutdown callbacks after the GPIO bank has been removed, potentially resulting in a use-after-free and kernel crash.

Fix the resource leak by explicitly calling irq_domain_remove_generic_chips() before removing the IRQ domain in rockchip_gpio_remove().

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/bace7b99bfa555fe833aee8827b8004c43666d02
• https://git.kernel.org/stable/c/1f34ea5f6114011092d9a5c8b901ad6741144a1d
• https://git.kernel.org/stable/c/1c1e0fc88d6ef65bf15d517853251f75ab9d18c3

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