Bug 2532090 (CVE-2026-89475) - CVE-2026-89475 kernel: Linux kernel: Use-after-free in bq24257 power supply driver
Summary: CVE-2026-89475 kernel: Linux kernel: Use-after-free in bq24257 power supply d...
Keywords:
Status: NEW
Alias: CVE-2026-89475
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-11 20:28 UTC by OSIDB Bzimport
Modified: 2026-09-11 20:49 UTC (History)
15 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-09-11 20:28:53 UTC
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.


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