CVE-2026-45869
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.
Does this matter?
Lower severity and a low EPSS score (0.16%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.16% probability · 6th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/39fe0eac6d755ef215026518985fcf8de9360e9ePatch
- https://git.kernel.org/stable/c/3d7b5391bb95505b3581c1fb77150c467ab92864Patch
- https://git.kernel.org/stable/c/438f9a303ea8b55162b2d5376490c2ab3ec165a0Patch
- https://git.kernel.org/stable/c/86183153c299e8bb1839e717286d6c6f39508a59Patch
- https://git.kernel.org/stable/c/93bdf715d33cf5ee01c58e8546c2469c71ce082aPatch
- https://git.kernel.org/stable/c/9b7d77cb046b4487e8e511e04e62b6f416ce845cPatch
- https://git.kernel.org/stable/c/c0def811ad8d642dca9b6d31a198cc39f5f90837Patch
- https://git.kernel.org/stable/c/dfaf235d5a6b60cbf115a14a656946303ad007b7Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.