CVE-2026-93142

Summary

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

thermal/drivers/rcar: Fix error checking in probe()

This code accidentally calls thermal_zone_device_enable() before checking whether thermal_zone_device_register_with_trips() failed. Move the call until later to avoid an error pointer dereference of "priv->zone".

The driver works differently depending on if we are using OF thermal or not. We use thermal_add_hwmon_sysfs() if we are using OF thermal and call thermal_zone_device_enable() if not. We can share same error check for if either of these fail.

Moving the thermal_zone_device_enable() call is a bit cleaner as well. The original code used a three step process to cleanup:

1. Call thermal_zone_device_unregister() to cleanup.
2. Set priv->zone to an error pointer to preserve the error code.
3. Set priv->zone to NULL to avoid a second call to thermal_zone_device_unregister() in the rcar_thermal_remove() function.

Now we can just do a direct goto error_unregister and rcar_thermal_remove() handles the cleanup properly.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/a85bcd0c7ef66e3404b3c99e5589c5ea622a757e
• https://git.kernel.org/stable/c/810875c5996f731961fc5ee1bd24e711f2e8fe78
• https://git.kernel.org/stable/c/623349a18d4c6e6add7876553c0cb6947c8d92e6
• https://git.kernel.org/stable/c/35bf61798e7d4abf39667d98f298f793b3dd9bbe
• https://git.kernel.org/stable/c/d67607e7749527850619a10d3ed033b02dcea516
• https://git.kernel.org/stable/c/dd04ad1cdabcad51e34b74b4e91b9aeb7180d05d

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