Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 13151631b5bd06a1511353bb221079bbd76606c3 before c2ce9b8f325f522e10e4d262b37ae49deb83e79b; affected 13151631b5bd06a1511353bb221079bbd76606c3 before c660c017dec1fd7cd88e1103c5ae1aae6ce636bf; affected 13151631b5bd06a1511353bb221079bbd76606c3 before 013731074ab6a8d11ec209eee64c5b2656954479; affected 13151631b5bd06a1511353bb221079bbd76606c3 before 75b1e88d34254f4fb7753345e21bfee47abddd7f |
| Linux / Linux | affected 3.4; unaffected 0 before 3.4; unaffected 6.12.112 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.