Description
In the Linux kernel, the following vulnerability has been resolved: power: supply: ab8500_fg: fix use-after-free on remove ab8500_fg_remove() destroys the driver workqueue while the threaded interrupt handlers are still armed; they are devm-managed and freed only after ->remove() returns, so a handler that fires in that window queues work on the freed workqueue. Tear the workqueue down through devm instead, registering its cleanup after the power supply and before the interrupt requests. devm then frees the interrupts first, so the handlers can no longer queue work, before disabling the delayed and plain work items and destroying the workqueue. Disabling the items, rather than cancelling them, keeps them disabled so no producer (including the power-supply external_power_changed callback) can requeue them. Found by an in-house static analysis tool.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
13151631b5bd06a1511353bb221079bbd76606c3 to < c2ce9b8f325f522e10e4d262b37ae49deb83e79baffected13151631b5bd06a1511353bb221079bbd76606c3 to < c660c017dec1fd7cd88e1103c5ae1aae6ce636bfaffected13151631b5bd06a1511353bb221079bbd76606c3 to < 013731074ab6a8d11ec209eee64c5b2656954479affected13151631b5bd06a1511353bb221079bbd76606c3 to < 75b1e88d34254f4fb7753345e21bfee47abddd7faffected
Linux Linux
Default version status: affected
3.4affected0 to < 3.4unaffected6.12.112 to ≤ 6.12.*unaffected6.18.51 to ≤ 6.18.*unaffected7.2.5 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected