Description
In the Linux kernel, the following vulnerability has been resolved: power: supply: wm97xx: Fix NULL pointer dereference in power_supply_changed() In `probe()`, `request_irq()` is called before allocating/registering a `power_supply` handle. If an interrupt is fired between the call to `request_irq()` and `power_supply_register()`, the `power_supply` handle will be used uninitialized in `power_supply_changed()` in `wm97xx_bat_update()` (triggered from the interrupt handler). This will lead to a `NULL` pointer dereference since Fix this racy `NULL` pointer dereference by making sure the IRQ is requested _after_ the registration of the `power_supply` handle. Since the IRQ is the last thing requests in the `probe()` now, remove the error path for freeing it. Instead add one for unregistering the `power_supply` handle when IRQ request fails.
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/39fe0eac6d755ef215026518985fcf8de9360e9e Patch
- git.kernel.org/stable/c/3d7b5391bb95505b3581c1fb77150c467ab92864 Patch
- git.kernel.org/stable/c/438f9a303ea8b55162b2d5376490c2ab3ec165a0 Patch
- git.kernel.org/stable/c/86183153c299e8bb1839e717286d6c6f39508a59 Patch
- git.kernel.org/stable/c/93bdf715d33cf5ee01c58e8546c2469c71ce082a Patch
- git.kernel.org/stable/c/9b7d77cb046b4487e8e511e04e62b6f416ce845c Patch
- git.kernel.org/stable/c/c0def811ad8d642dca9b6d31a198cc39f5f90837 Patch
- git.kernel.org/stable/c/dfaf235d5a6b60cbf115a14a656946303ad007b7 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 5 · as of 14 November 2026
- CWE
- CWE-476
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