CVE-2026-89993

Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: dw-edma: Initialize IRQ data before requesting IRQs dw_edma_irq_request() passes struct dw_edma_irq to request_irq() before dw_edma_channel_setup() fills the back pointer. A shared interrupt can therefore enter the handler with dw_irq->dw still NULL, leading to a NULL pointer dereference. Set the back pointer before installing each handler.

References

• https://git.kernel.org/stable/c/07e50cef557def076418c67051a336e4c6bd50e1
• https://git.kernel.org/stable/c/17ef63843c0fcbf1efdfbbfb0f5584a5ea2c91ba
• https://git.kernel.org/stable/c/647217abea849d3d45f8cb0b8ee5b78d50f26985
• https://git.kernel.org/stable/c/b86280b12ccf33b68b309b7cb0e4476894dfe77c
• https://git.kernel.org/stable/c/d232bc6cf4562132ef50644484dfd4b23a593295