What’s Vulnerable › Vulnerabilities

CVE-2026-98656: iio: trigger: cancel reenable_work before freeing trigger

• 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: trigger: cancel reenable_work before freeing trigger iio_trigger_notify_done_atomic() defers ->reenable() into trig->reenable_work on the system workqueue, and the worker dereferences the owning trigger through container_of(). Nothing cancels this work before iio_trig_release() frees the trigger, so a worker armed by the last in-flight IRQ can outlive the free and touch freed memory. Cancel it at the top of iio_trig_release(), which every free path reaches through the device core's final put_device(). Found by an in-house static analysis tool.

Affected products

• Linux: from 5.15.17 before 5.15.224; from 5.16.3 before 5.17 — fixed in 5.15.224, 5.17

How to fix

Upgrade to a fixed version: Linux 5.15.224, 5.17. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2a57b9246cecd5dd797a42eb310d6c8816f26d9e
• https://git.kernel.org/stable/c/4e790a5bd4249877bcf0c94db12ac490965f9296
• https://git.kernel.org/stable/c/882d0011c59ff8ac15188ec9ce071399ecfa10ad
• https://git.kernel.org/stable/c/ac5d26a46c90ff61fd574eff4e8f0d71c905828a
• https://git.kernel.org/stable/c/beec4c9e23b8293c41d3448f9807c28fc9a599d4
• https://git.kernel.org/stable/c/cf513df1a2c75566cdc802d9da47f62e8d6cfd18
• https://git.kernel.org/stable/c/e64703280ce7a23a43c27efebeb7da457c88bf5c

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