CVEvulnerability
CVE-2026-89475
- Status
- Received
- Published
- 2026-09-11
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
power: supply: bq24257: fix use-after-free on remove
The STAT-pin interrupt is devm-managed, so it stays armed until the devm
cleanup that runs after remove() returns. remove() cancels
bq->iilimit_setup_work while the threaded handler can still fire; that
handler reschedules the work and dereferences bq, so the work runs
against freed memory once devm frees bq.
Make the delayed work device-managed with devm_delayed_work_autocancel(),
registered before the interrupt request. The devm cleanup then releases
the interrupt first, so the handler can no longer reschedule the work,
and cancels the work before bq is freed. The explicit
cancel_delayed_work_sync() in remove() is no longer needed and is dropped.
Found by static analysis.
References
- https://git.kernel.org/stable/c/47ccbad210f48721c30d69d65b83dc9fff919ca9 git.kernel.org
- https://git.kernel.org/stable/c/6d2eb93975c07b0169a3287efc1ae3b60cf52d8e git.kernel.org
- https://git.kernel.org/stable/c/861ec73ce86e2ca18082cc7be4f140a5bbdf1428 git.kernel.org
- https://git.kernel.org/stable/c/9d34c9d660c3d0931d2cc749c46c47cf31f96e48 git.kernel.org
- https://git.kernel.org/stable/c/9d77fd7dd9a3ad57f7655c5264b503b85adbb7b8 git.kernel.org
- https://git.kernel.org/stable/c/a279e64c907f5638bb34cb8e2c9285798cf5f690 git.kernel.org
- https://git.kernel.org/stable/c/f495808cdd6d9576965787cf6d9737d0b0e86b73 git.kernel.org