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.

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EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.10%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other 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 https://git.kernel.org/stable/c/d91fb6c0d10dad32929dc5c6850f89df34e1bfcd https://git.kernel.org/stable/c/fac202d73e7a649b7d4010325c6c6dcd9334fe65

Frequently Asked Questions

What is CVE-2026-89993? +

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.

How do I check if I'm vulnerable to CVE-2026-89993? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.