CVE-2026-45869
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
In the Linux kernel, a NULL pointer dereference vulnerability was found in the wm97xx power supply driver. The issue occurs when an interrupt (IRQ) is registered before the power_supply structure is initialized, potentially leading to the use of an uninitialized pointer in the power_supply_changed() function.
Risk Assessment
An attacker could exploit this vulnerability to cause a system crash (kernel panic) by deliberately triggering an interrupt during a critical moment of driver initialization, leading to a denial of service (DoS).
Recommendation
Immediately update the Linux kernel to a version containing the fix that moves IRQ registration after the power_supply structure initialization. For embedded systems using this driver, apply the patch or update the BSP.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

