Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: clk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path When mtk_clk_register_pllfhs function fails to register a PLL, it unregisters all PLLs and cleans up itself in its error path before returning, so the function callers don't need to do it. But contrary to mtk_clk_unregister_pllfhs function, that does almost the same sequence, it does not free the IO memory mapped on fhctl node, leading to a leak. Fix this leak by factorizing the cleanup sequence in a new private function and use it both mtk_clk_register_pllfhs and mtk_clk_unregister_pllfhs functions. Also, change the loop index start value to avoid the -1 operation on index at each loop.
References
- https://git.kernel.org/stable/c/540d91480bcb1b28a62d7023aa70947ea44c55b9
- https://git.kernel.org/stable/c/d35e45e5bad4fabcf122126402b6c6dcb4379672
- https://git.kernel.org/stable/c/fea0b4fd891a2af77b55e05b950e7ea55b5d234e
FAQ
What is CVE-2026-90422?
CVE-2026-90422 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: clk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path When mtk_clk_register_pllfhs function fails to register ...
How severe is CVE-2026-90422?
CVSS scoring is not yet available for CVE-2026-90422. Check NVD for updates.
Is there a patch for CVE-2026-90422?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.