CVE-2026-64241

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

gpio: rockchip: teardown bugs and resource leaks

Address several teardown issues and resource leaks in the drivers remove path and error handling:

1. Debounce clock reference leak: The debounce clock (bank->db_clk) is obtained using of_clk_get() which increments the clocks reference count, but clk_put() is never called. Register a devm action to cleanly release it on unbind. Note that of_clk_get(…, 1) remains necessary over devm_clk_get() because the DT binding does not define clock-names, precluding name-based lookup.

2. Unregistered chained IRQ handler: The chained IRQ handler is not disconnected in remove(). If a stray interrupt fires after the driver is removed, the kernel attempts to execute a stale handler, leading to a panic. Fix this by clearing the handler in remove().

3. IRQ domain leak: The linear IRQ domain and its generic chips are allocated manually during probe but never removed. Remove the IRQ domain during driver teardown to free the associated generic chips and mappings.

[Bartosz: dont emit an error message on devres allocation failure]

Weakness

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Software

Potential Mitigations

• Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone.
• For example, glibc in Linux provides protection against free of invalid pointers.
• When using Xcode to target OS X or iOS, enable automatic reference counting (ARC) [REF-391].
• To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std::auto_ptr (defined by ISO/IEC ISO/IEC 14882:2003), std::shared_ptr and std::unique_ptr (specified by an upcoming revision of the C++ standard, informally referred to as C++ 1x), or equivalent solutions such as Boost.

References

• https://git.kernel.org/stable/c/6be81e77e1748665d7ddab9128ff1d35eb75b87d
• https://git.kernel.org/stable/c/7f945f7f10f442270518dfd768d230227c495fcf
• https://git.kernel.org/stable/c/9500077678230e36d22bf16d2b9539c13e59a801
• https://git.kernel.org/stable/c/cdc603ce3118232712ba443dd8b414d8f25ca467