SB20260912315 - 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-2026-89472)

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 trigger a use-after-free condition.

The vulnerability exists due to use-after-free in charger-manager regulator handle management when handling a concurrent write to the externally_control sysfs attribute during device teardown. A local user can write to the externally_control sysfs attribute while charging is enabled to trigger a use-after-free condition.

The sysfs attribute can also be exposed before regulator acquisition completes during probing.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6d532582ff3c420598f02945b13184c738cc1581
• https://git.kernel.org/stable/c/86e4fa65368f3bbb506dddba8c9eedc75bd603b2
• https://git.kernel.org/stable/c/af3ce383ba0d0d48957a22ac7058ff5698775898
• https://git.kernel.org/stable/c/c57cb36f76eb7ced45f57af1a890d8f3a6d76342