CVE-2026-90126
kernel: rtc: pcf8563: fix clock provider leak on unbind
Severity
LowRed 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's Real-Time Clock (RTC) pcf8563 driver. The pcf8563_clkout_register_clk() function registers a clock provider without properly unregistering it when the device is unbound or the module is reloaded. This oversight causes a continuous leak of memory and object references. Repeated exploitation of this vulnerability could lead to resource exhaustion, potentially resulting in a Denial of Service (DoS) for the system.
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