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CVE-2025-39774: iio: adc: rzg2l_adc: Set driver data before enabling runtime PM

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-11 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: iio: adc: rzg2l_adc: Set driver data before enabling runtime PM When stress-testing the system by repeatedly unbinding and binding the ADC device in a loop, and the ADC is a supplier for another device (e.g., a thermal hardware block that reads temperature through the ADC), it may happen that the ADC device is runtime-resumed immediately after runtime PM is enabled, triggered by its consumer. At this point, since drvdata is not yet set and the driver's runtime PM callbacks rely on it, a crash can occur. To avoid this, set drvdata just after it was allocated.

Affected products

• Linux kernel: from 6.14 before 6.16.4; 6.17-rc1, 6.17-rc2 — fixed in 6.16.4

How to fix

Upgrade to a fixed version: Linux kernel 6.16.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/c69e13965f26b8058f538ea8bdbd2d7718cf1fbe
• https://git.kernel.org/stable/c/e7ce902db071a7b3e696a43d6e14ca57360deee6

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