SB2026091997 - Memory leak in Linux kernel rtc driver
Published: September 19, 2026
Security Bulletin ID
SB2026091997
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2026-90126)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to improper resource cleanup in the pcf8563 RTC driver's CLKOUT clock provider registration when repeatedly binding and unbinding a device. A local privileged user can repeatedly bind and unbind a device or reload the module to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/08a59c28c2bdbcd655e99526c86a41dc83834283
- https://git.kernel.org/stable/c/2b5622cf4ee218b6f98d31dbf3fbd44b9b6bd675
- https://git.kernel.org/stable/c/30b7c63af50fe1464e7582a37de1ca4bd030ecc1
- https://git.kernel.org/stable/c/36cb00c33bd83e7ce31b5a9f1f7c70db0cb7776c
- https://git.kernel.org/stable/c/6218c0533a72235ec9c5f41b812c63d963bd4a3e
- https://git.kernel.org/stable/c/7afb8db47c4f107bce89cfe5115fb31ba7c94665
- https://git.kernel.org/stable/c/97edf3fd9a46ea89a167966991c0449cfa07b36f
- https://git.kernel.org/stable/c/9c48a53685040bb0de45a640b34055cbbfc69d4f