CVE-2026-89475
Low risk· EPSS 10%Exploitation Probability (EPSS)
Low risk10th percentile - higher than 10% of all known CVEs
Summary
In the Linux kernel, in the power: supply: bq24257 driver the STAT-pin interrupt is devm-managed and stays armed until devm cleanup after remove() returns. remove() cancels bq->iilimit_setup_work while the threaded handler can still fire and reschedule it, dereferencing freed memory. The fix uses devm_delayed_work_autocancel() and registers the work before the interrupt request.
Risk Assessment
A use-after-free in kernel context may occur, leading to a system crash or potential privilege escalation when the device is detached.
Recommendation
Update the Linux kernel to a version containing the fix. Avoid hot-unplugging affected bq24257 devices until patched.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS