Use-after-free in Linux kernel - CVE-2026-89472

Vulnerability details

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.

Affected software

How to mitigate CVE-2026-89472

External 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

Related Security Bulletins

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