PT-2026-61114 · Linux · Linux
CVE-2026-63798
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Publicado
2026-07-19
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Atualizado
2026-07-19
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In the Linux kernel, the following vulnerability has been resolved:
irqchip/imgpdc: Fix resource leak, add missing chained handler cleanup on remove
The driver allocates domain generic chips using
irq alloc domain generic chips() during probe and sets up chained
handlers using irq set chained handler and data(). However, on driver
removal, the generic chips are not freed and the chained handlers are
not removed.
The generic chips remain on the global gc 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.
The chained handlers that were installed in probe for peripheral and
syswake interrupts are also left dangling, which can lead to spurious
interrupts accessing freed memory.
Fix these issues by:
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Setting IRQ DOMAIN FLAG DESTROY GC flag in domain->flags, so the core code automatically removes generic chips when irq domain remove() is called
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Clearing all chained handlers with NULL in pdc intc remove()
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