CVE-2026-89475

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2219a935963e5eeb19e5abfb99475fcc06bbb804 < 9d77fd7dd9a3ad57f7655c5264b503b85adbb7b8affected
LinuxLinux2219a935963e5eeb19e5abfb99475fcc06bbb804 < a279e64c907f5638bb34cb8e2c9285798cf5f690affected
LinuxLinux2219a935963e5eeb19e5abfb99475fcc06bbb804 < 6d2eb93975c07b0169a3287efc1ae3b60cf52d8eaffected
LinuxLinux2219a935963e5eeb19e5abfb99475fcc06bbb804 < 861ec73ce86e2ca18082cc7be4f140a5bbdf1428affected
LinuxLinux2219a935963e5eeb19e5abfb99475fcc06bbb804 < f495808cdd6d9576965787cf6d9737d0b0e86b73affected
LinuxLinux2219a935963e5eeb19e5abfb99475fcc06bbb804 < 47ccbad210f48721c30d69d65b83dc9fff919ca9affected
LinuxLinux2219a935963e5eeb19e5abfb99475fcc06bbb804 < 9d34c9d660c3d0931d2cc749c46c47cf31f96e48affected
LinuxLinux4.2affected
LinuxLinux0 < 4.2unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.109 <= 6.12.*unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References