FKIE_CVE-2026-45869

Vulnerability from fkie_nvd - Published: 2026-05-27 14:17 - Updated: 2026-05-27 14:48
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/39fe0eac6d755ef215026518985fcf8de9360e9e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d7b5391bb95505b3581c1fb77150c467ab92864
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/438f9a303ea8b55162b2d5376490c2ab3ec165a0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/86183153c299e8bb1839e717286d6c6f39508a59
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/93bdf715d33cf5ee01c58e8546c2469c71ce082a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9b7d77cb046b4487e8e511e04e62b6f416ce845c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c0def811ad8d642dca9b6d31a198cc39f5f90837
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dfaf235d5a6b60cbf115a14a656946303ad007b7
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: wm97xx: Fix NULL pointer dereference in power_supply_changed()\n\nIn `probe()`, `request_irq()` is called before allocating/registering a\n`power_supply` handle. If an interrupt is fired between the call to\n`request_irq()` and `power_supply_register()`, the `power_supply` handle\nwill be used uninitialized in `power_supply_changed()` in\n`wm97xx_bat_update()` (triggered from the interrupt handler). This will\nlead to a `NULL` pointer dereference since\n\nFix this racy `NULL` pointer dereference by making sure the IRQ is\nrequested _after_ the registration of the `power_supply` handle. Since\nthe IRQ is the last thing requests in the `probe()` now, remove the\nerror path for freeing it. Instead add one for unregistering the\n`power_supply` handle when IRQ request fails."
    }
  ],
  "id": "CVE-2026-45869",
  "lastModified": "2026-05-27T14:48:31.480",
  "metrics": {},
  "published": "2026-05-27T14:17:00.290",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/39fe0eac6d755ef215026518985fcf8de9360e9e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3d7b5391bb95505b3581c1fb77150c467ab92864"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/438f9a303ea8b55162b2d5376490c2ab3ec165a0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/86183153c299e8bb1839e717286d6c6f39508a59"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/93bdf715d33cf5ee01c58e8546c2469c71ce082a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9b7d77cb046b4487e8e511e04e62b6f416ce845c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c0def811ad8d642dca9b6d31a198cc39f5f90837"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dfaf235d5a6b60cbf115a14a656946303ad007b7"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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