CVE-2026-89993 PUBLISHED

dmaengine: dw-edma: Initialize IRQ data before requesting IRQs

Assigner: Linux
Reserved: 11.09.2026 Published: 16.09.2026 Updated: 16.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf to b86280b12ccf33b68b309b7cb0e4476894dfe77c (excl.)
  • affected from e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf to 07e50cef557def076418c67051a336e4c6bd50e1 (excl.)
  • affected from e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf to 17ef63843c0fcbf1efdfbbfb0f5584a5ea2c91ba (excl.)
  • affected from e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf to d232bc6cf4562132ef50644484dfd4b23a593295 (excl.)
  • affected from e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf to fac202d73e7a649b7d4010325c6c6dcd9334fe65 (excl.)
  • affected from e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf to d91fb6c0d10dad32929dc5c6850f89df34e1bfcd (excl.)
  • affected from e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf to 647217abea849d3d45f8cb0b8ee5b78d50f26985 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.3 is affected
  • unaffected from 0 to 5.3 (excl.)
  • unaffected from 5.15.221 to 5.15.* (incl.)
  • unaffected from 6.1.188 to 6.1.* (incl.)
  • unaffected from 6.6.157 to 6.6.* (incl.)
  • unaffected from 6.12.110 to 6.12.* (incl.)
  • unaffected from 6.18.51 to 6.18.* (incl.)
  • unaffected from 7.2.5 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References