CVE-2026-43181

Summary

In the Linux kernel, the following vulnerability has been resolved:

gpio: sysfs: fix chip removal with GPIOs exported over sysfs

Currently if we export a GPIO over sysfs and unbind the parent GPIO controller, the exported attribute will remain under /sys/class/gpio because once we remove the parent device, we can no longer associate the descriptor with it in gpiod_unexport() and never drop the final reference.

Rework the teardown code: provide an unlocked variant of gpiod_unexport() and remove all exported GPIOs with the sysfs_lock taken before unregistering the parent device itself. This is done to prevent any new exports happening before we unregister the device completely.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1cd53df733c21ae0d344a2dec941a3e2a06fefd9 < 54f463494eb5bf193ef7d904a493474c451734dfaffected
LinuxLinux1cd53df733c21ae0d344a2dec941a3e2a06fefd9 < a645cc25904b0baf508b77a0402ce151212b9800affected
LinuxLinux1cd53df733c21ae0d344a2dec941a3e2a06fefd9 < 6766f59012301f1bf3f46c6e7149caca45d92309affected
LinuxLinux6.17affected
LinuxLinux0 < 6.17unaffected
LinuxLinux6.18.16 <= 6.18.*unaffected
LinuxLinux6.19.6 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References