CVE-2026-90422
kernel: clk: mediatek: pllfh: Fix IO remapping leak in register_pllfhs error path
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 6, 2026
Description
A flaw was found in the Linux kernel. When the mtk_clk_register_pllfhs function, part of the MediaTek Phase-Locked Loop (PLL) clock driver, fails to register a PLL, it does not properly free the input/output (IO) memory mapped on the fhctl node. This oversight leads to a memory leak. Over time, repeated failures could exhaust system memory, potentially resulting in a Denial of Service (DoS) for affected systems.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime