CVE-2026-45869
published 2026-05-27CVE-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()`…
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
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 7c87942aef52d2120e95ff1dec739998b9f95a78 < 3d7b5391bb95505b3581c1fb77150c467ab92864 | 3d7b5391bb95505b3581c1fb77150c467ab92864 |
| linux | linux | >= 7c87942aef52d2120e95ff1dec739998b9f95a78 < 438f9a303ea8b55162b2d5376490c2ab3ec165a0 | 438f9a303ea8b55162b2d5376490c2ab3ec165a0 |
| linux | linux | >= 7c87942aef52d2120e95ff1dec739998b9f95a78 < 9b7d77cb046b4487e8e511e04e62b6f416ce845c | 9b7d77cb046b4487e8e511e04e62b6f416ce845c |
| linux | linux | >= 7c87942aef52d2120e95ff1dec739998b9f95a78 < 86183153c299e8bb1839e717286d6c6f39508a59 | 86183153c299e8bb1839e717286d6c6f39508a59 |
| linux | linux | >= 7c87942aef52d2120e95ff1dec739998b9f95a78 < 93bdf715d33cf5ee01c58e8546c2469c71ce082a | 93bdf715d33cf5ee01c58e8546c2469c71ce082a |
| linux | linux | >= 7c87942aef52d2120e95ff1dec739998b9f95a78 < c0def811ad8d642dca9b6d31a198cc39f5f90837 | c0def811ad8d642dca9b6d31a198cc39f5f90837 |
| linux | linux | >= 7c87942aef52d2120e95ff1dec739998b9f95a78 < dfaf235d5a6b60cbf115a14a656946303ad007b7 | dfaf235d5a6b60cbf115a14a656946303ad007b7 |
| linux | linux | >= 7c87942aef52d2120e95ff1dec739998b9f95a78 < 39fe0eac6d755ef215026518985fcf8de9360e9e | 39fe0eac6d755ef215026518985fcf8de9360e9e |
| linux | linux_kernel | — | — |