CVE-2026-46269

Summary

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

pinctrl: canaan: k230: Fix NULL pointer dereference when parsing devicetree

When probing the k230 pinctrl driver, the kernel triggers a NULL pointer dereference. The crash trace showed: [ 0.732084] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000068 [ 0.740737] … [ 0.776296] epc : k230_pinctrl_probe+0x1be/0x4fc

In k230_pinctrl_parse_functions(), we attempt to retrieve the device pointer via info->pctl_dev->dev, but info->pctl_dev is only initialized after k230_pinctrl_parse_dt() completes.

At the time of DT parsing, info->pctl_dev is still NULL, leading to the invalid dereference of info->pctl_dev->dev.

Use the already available device pointer from platform_device instead of accessing through uninitialized pctl_dev.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd94a32ac688f953dc9a9f12b5b4139ecad841bbb < 3c7d637bfc3dfbd6471c68bd767f7eb8b5b09ebaaffected
LinuxLinuxd94a32ac688f953dc9a9f12b5b4139ecad841bbb < 1d0d361f4dbc2bb2003594f84e4b101fc6b508c0affected
LinuxLinuxd94a32ac688f953dc9a9f12b5b4139ecad841bbb < d8c128fb6c2277d95f3f6a4ce28b82c8370031f6affected
LinuxLinux02c1deb1bff2b6d242e29a51e56107495979a2b8affected
LinuxLinux0ec03251d01494ef207089b5bd626becfd05fd86affected
LinuxLinux6.15.10 < 6.16affected
LinuxLinux6.16.1 < 6.17affected
LinuxLinux6.17affected
LinuxLinux0 < 6.17unaffected
LinuxLinux6.18.14 <= 6.18.*unaffected
LinuxLinux6.19.4 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References