CVE-2026-93273regulator: tps6594: Fix device node reference leaks in multiphase loop

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

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/28f70e0aa767a8f022c70ed75ecef227dc668121
• https://git.kernel.org/stable/c/4a672bff99f6b58dde419fd12b3a53da137f032d
• https://git.kernel.org/stable/c/68ce4f8223b78f8616ec7f4a02c38988eae627d2
• https://git.kernel.org/stable/c/fceac25487b21d6db940d2aed368e465d89cd1f4
• https://git.kernel.org/stable/c/7fd28093b3effc4f92566466df364622830ec608