PT-2026-52947 · Undefined · Undefined
Publicado
2026-06-26
·
Atualizado
2026-06-26
·
CVE-2026-53308
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In the Linux kernel, the following vulnerability has been resolved:
power: supply: max77705: Free allocated workqueue and fix removal order
Use devm interface for allocating workqueue to fix two bugs at the same
time:
-
Driver leaks the memory on remove(), because the workqueue is not destroyed.
-
Driver allocates workqueue and then registers interrupt handlers with devm interface. This means that probe error paths will not use a reversed order, but first destroy the workqueue and then, via devm release handlers, free the interrupt.
The interrupt handler schedules work on this exact workqueue, thus if
interrupt is hit in this short time window - after destroying
workqueue, but before devm() frees the interrupt - the schedulled
work will lead to use of freed memory.
Change is not equivalent in the workqueue itself: use non-legacy API
which does not set ( WQ LEGACY | WQ MEM RECLAIM). The workqueue is
used to update power supply (power supply changed()) status, thus there
is no point to run it for memory reclaim. Note that dev name() is not
directly used in second argument to prevent possible unlikely parsing
any "%" character in device name as format.
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