Resource Leak in Linux Kernel Driver Affects Generic Chips Management

CVE-2026-63798

What is CVE-2026-63798?

A vulnerability in the Linux kernel related to the irqchip/imgpdc driver manifests as a resource leak during the removal of generic chips. Specifically, when the driver is probed, it allocates chips and configures chained handlers. However, upon driver removal, these resources are not properly freed or de-registered, which may leave dangling handlers that cause spurious interrupts and access to freed memory. This situation can lead to critical stability issues, including kernel crashes. The recommended fix involves setting the IRQ_DOMAIN_FLAG_DESTROY_GC flag to ensure proper cleanup of resources during driver removal and clearing handlers with NULL to prevent access to invalid memory.

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