SB20260912324 - Use-after-free in Linux kernel power supply driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-89465)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to access freed rt9455_info memory.

The vulnerability exists due to improper delayed-work cancellation in RT9455 charger driver teardown handling when delayed work is pending during device removal or probe error cleanup. A local user can race delayed work with teardown to access freed rt9455_info memory.

The threaded IRQ handler can queue delayed work, and batt_presence_work can requeue itself or queue max_charging_time_work.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1b9978433c61a9b46e48832a1ebceee1cf5c9eb4
• https://git.kernel.org/stable/c/3e7a1ebc32fad5a558254a478efd401c17a24381
• https://git.kernel.org/stable/c/7323e562f6961e4b7bce3225cde4ecbc78260deb
• https://git.kernel.org/stable/c/df67c7a2fff8414aa766b8cd5ffe11ec1ca27d02