CVE-2026-93274: Linux kernel bcm2835 pinctrl null pointer dereference

CVE-2026-93274 · Severity: info · Published 2026-09-24

The Linux kernel's BCM2835 pinctrl driver contains a flaw in its initialization code that can cause the system to panic. When the pinctrl registration fails during device startup, the driver attempts to clean up a GPIO chip that was never registered, resulting in a null pointer access that crashes the kernel.

Technologies: Linux. Vendors: Linux.

Quick answers

Is CVE-2026-93274 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-93274 being exploited in the wild.
How severe is CVE-2026-93274?
Informational severity, published 24 September 2026.
Which products and versions are affected?
Linux multiple versions affected (see kernel git history).
Is there a fix for CVE-2026-93274?
A patch was published on 2026-06-30. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-93274 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2026-93274?
Check whether you run Linux at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The bcm2835_pinctrl_probe() function calls gpiochip_remove() in its error path even when gpiochip_add_data() has not yet been called, causing gpiochip_remove() to dereference a NULL gpio_chip.gpiodev pointer. The vulnerability is a logic error in the cleanup sequence that triggers only when devm_pinctrl_register() fails. A fix removes the unnecessary gpiochip_remove() call since no GPIO cleanup is required for an unregistered chip.

Affected products

  • Linux Linux multiple versions affected (see kernel git history)

Timeline

  • 2026-09-24: disclosed
  • 2026-06-30: patched

References

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