CVE-2026-93273 regulator: tps6594: Fix device node reference leaks in multiphase loop
A missing NULL check in the TPS6594 regulator driver can cause a kernel crash via null pointer dereference during device probing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93273?
CVE-2026-93273 is a vulnerability in Linux, published on 24 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
regulator: tps6594: Fix device node reference leaks in multiphase loop
In tps6594_regulator_probe(), the multi-phase configuration loop calls of_find_node_by_name() to find buck nodes by name, and of_get_parent() twice to navigate to the PMIC parent node. None of the acquired node references (np, intermediate parent, np_pmic_parent) are ever released via of_node_put(), causing a reference leak on every loop iteration.
Additionally, of_find_node_by_name() can return NULL, but the result was immediately passed to of_node_full_name() and of_get_parent() without a NULL check, which could lead to a NULL pointer dereference.
Fix this by: - Adding a NULL check for np after of_find_node_by_name() - Storing the intermediate parent node in a local variable np_parent - Calling of_node_put() on np, np_parent and np_pmic_parent at the end of each loop iteration
Which versions are affected by CVE-2026-93273?
How do I fix CVE-2026-93273?
Apply the vendor's patch.
Is CVE-2026-93273 being exploited?
There is no known exploitation of CVE-2026-93273 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-93273, DEBIAN-CVE-2026-93273, GHSA-f775-wj9m-j2c6, UBUNTU-CVE-2026-93273.