CVE-2026-93142
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.
How to fix
- Linux Linuxa85bcd0c7ef66e3404b3c99e5589c5ea622a757e, 810875c5996f731961fc5ee1bd24e711f2e8fe78, 623349a18d4c6e6add7876553c0cb6947c8d92e6, 35bf61798e7d4abf39667d98f298f793b3dd9bbe, d67607e7749527850619a10d3ed033b02dcea516, dd04ad1cdabcad51e34b74b4e91b9aeb7180d05d or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | bbcf90c0646ac797700269fa6645a6a46466c79f ≤ v < a85bcd0c7ef66e3404b3c99e5589c5ea622a757e, bbcf90c0646ac797700269fa6645a6a46466c79f ≤ v < 810875c5996f731961fc5ee1bd24e711f2e8fe78, bbcf90c0646ac797700269fa6645a6a46466c79f ≤ v < 623349a18d4c6e6add7876553c0cb6947c8d92e6, bbcf90c0646ac797700269fa6645a6a46466c79f ≤ v < 35bf61798e7d4abf39667d98f298f793b3dd9bbe, bbcf90c0646ac797700269fa6645a6a46466c79f ≤ v < d67607e7749527850619a10d3ed033b02dcea516, bbcf90c0646ac797700269fa6645a6a46466c79f ≤ v < dd04ad1cdabcad51e34b74b4e91b9aeb7180d05d, 5.9 | a85bcd0c7ef66e3404b3c99e5589c5ea622a757e, 810875c5996f731961fc5ee1bd24e711f2e8fe78, 623349a18d4c6e6add7876553c0cb6947c8d92e6, 35bf61798e7d4abf39667d98f298f793b3dd9bbe, d67607e7749527850619a10d3ed033b02dcea516, dd04ad1cdabcad51e34b74b4e91b9aeb7180d05d |
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