CVE-2026-45869

Summary

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 Software

Weaknesses

References

• https://git.kernel.org/stable/c/3d7b5391bb95505b3581c1fb77150c467ab92864
• https://git.kernel.org/stable/c/438f9a303ea8b55162b2d5376490c2ab3ec165a0
• https://git.kernel.org/stable/c/9b7d77cb046b4487e8e511e04e62b6f416ce845c
• https://git.kernel.org/stable/c/86183153c299e8bb1839e717286d6c6f39508a59
• https://git.kernel.org/stable/c/93bdf715d33cf5ee01c58e8546c2469c71ce082a
• https://git.kernel.org/stable/c/c0def811ad8d642dca9b6d31a198cc39f5f90837
• https://git.kernel.org/stable/c/dfaf235d5a6b60cbf115a14a656946303ad007b7
• https://git.kernel.org/stable/c/39fe0eac6d755ef215026518985fcf8de9360e9e

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