CVEvulnerability
CVE-2026-93142
- Status
- Received
- Published
- 2026-09-17
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
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.
References
- https://git.kernel.org/stable/c/35bf61798e7d4abf39667d98f298f793b3dd9bbe git.kernel.org
- https://git.kernel.org/stable/c/623349a18d4c6e6add7876553c0cb6947c8d92e6 git.kernel.org
- https://git.kernel.org/stable/c/810875c5996f731961fc5ee1bd24e711f2e8fe78 git.kernel.org
- https://git.kernel.org/stable/c/a85bcd0c7ef66e3404b3c99e5589c5ea622a757e git.kernel.org
- https://git.kernel.org/stable/c/d67607e7749527850619a10d3ed033b02dcea516 git.kernel.org
- https://git.kernel.org/stable/c/dd04ad1cdabcad51e34b74b4e91b9aeb7180d05d git.kernel.org