What’s Vulnerable › Vulnerabilities

CVE-2026-98670: iio: adc: xilinx-xadc: free IRQ before cancelling the unmask worker on unbind

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: iio: adc: xilinx-xadc: free IRQ before cancelling the unmask worker on unbind The ZYNQ XADC alarm IRQ handler queues zynq_unmask_work via schedule_delayed_work(); that work is cleared by a devm callback. Register the devm callback before devm_request_irq() so the devres LIFO teardown frees the IRQ first, ensuring the handler can no longer queue work by the time the workqueue is cleared. Otherwise the handler could re-arm the work and run it after the xadc structure has been freed. This issue was found by an in-house static analysis tool.

Affected products

• Linux: from 5.10.200 before 5.11 — fixed in 5.11

How to fix

Upgrade to a fixed version: Linux 5.11. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/012451d72c12293918617ff98cc737bedad21910
• https://git.kernel.org/stable/c/0f3f427076240e75ff265e61645627a71ca4918c
• https://git.kernel.org/stable/c/49ea8a359e362bfbb32a647c8eb7962fbb37234e
• https://git.kernel.org/stable/c/7958959ab2a906c04f783a3ffb979c45472ad647
• https://git.kernel.org/stable/c/a29d385ad7b340c952a3935af2b33488db1eb3a6
• https://git.kernel.org/stable/c/a5fe2d1b55faba6d00fd87ad491b6cb603046304

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