CVEvulnerability
CVE-2026-89467
- Status
- Received
- Published
- 2026-09-11
- Last modified
- 2026-10-21
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
power: supply: qcom_battmgr: fix use-after-free
qcom_battmgr_pdr_notify() queues enable_work when the PMIC GLINK service
comes up, and the worker recovers battmgr through container_of() to issue
firmware requests. The PMIC GLINK client stays on the client list until
its devres release action runs, so a PDR notification can keep queueing
the work, and a pending or running worker can access battmgr after devres
frees it.
Make enable_work device-managed with devm_work_autocancel(), registered
before the PMIC GLINK client is allocated. The devres cleanup then
releases the client first, so no further notification can queue the work,
and cancels the work before battmgr is freed.
This issue was found by an in-house static analysis tool.
References
- https://git.kernel.org/stable/c/06618447029c6dddaa02f6e9528efe5dd49fc329 git.kernel.org
- https://git.kernel.org/stable/c/35964ed01e10b61a30066b0c568aa0e0e8fb6432 git.kernel.org
- https://git.kernel.org/stable/c/49fbcd3da2958159370d25dafbf736e654a4d59b git.kernel.org
- https://git.kernel.org/stable/c/4e40befedfc8ed86f44e1f81df92d13c149c9f8d git.kernel.org
- https://git.kernel.org/stable/c/77fefca305db44b0edd3fcdb52d781771c1ce366 git.kernel.org