Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `extcon` handle, means that the `extcon` handle will be deallocated/unregistered _before_ the interrupt handler (since `devm_` naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just _after_ the `extcon` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `extcon_set_state_sync()` with a freed `extcon` handle. Which usually crashes the system or otherwise silently corrupts the memory... Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `extcon` handle.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 before 9fab0120907e6965168e55b1e17cb9dfaf262b86; affected f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 before 47abfc207ab02cf1297257e282e8048da63f0d08; affected f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 before 48e0f68b50c344bb2d78d65dd98f93e41276ee00; affected f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 before 23067259919663580c6f81801847cfc7bd54fd1f |
| Linux / Linux | affected 6.7; unaffected 0 before 6.7; unaffected 6.12.75 through 6.12.*; unaffected 6.18.14 through 6.18.*; unaffected 6.19.4 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.