CVE-2026-64521: pinctrl: meson: amlogic-a4: fix deadlock issue

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: 2026-07-25 · updated 2026-07-25

Description

In the Linux kernel, the following vulnerability has been resolved: pinctrl: meson: amlogic-a4: fix deadlock issue Accessing the pinconf-pins sysfs node may deadlock. pinconf_pins_show() holds pctldev->mutex, and the platform driver calls pinctrl_find_gpio_range_from_pin(), which tries to acquire the same mutex again, leading to a deadlock. Use pinctrl_find_gpio_range_from_pin_nolock() to fix this issue.

Affected products

Linux kernel: 6.15 — fixed in 7.1

How to fix

Upgrade to a fixed version: Linux kernel 7.1. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/744ac926c0e55267a10b49b5b72582afef4ad49f
https://git.kernel.org/stable/c/e72ce029810390eb987a036fb2c8a5da9a23b685
https://git.kernel.org/stable/c/e917713f013423069782ff554935c7a5d4266783

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