GHSA-7C8R-GW7P-H2XW

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33
VLAI
Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-45869"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:00Z",
    "severity": null
  },
  "details": "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": "GHSA-7c8r-gw7p-h2xw",
  "modified": "2026-05-27T15:33:14Z",
  "published": "2026-05-27T15:33:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45869"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/39fe0eac6d755ef215026518985fcf8de9360e9e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d7b5391bb95505b3581c1fb77150c467ab92864"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/438f9a303ea8b55162b2d5376490c2ab3ec165a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86183153c299e8bb1839e717286d6c6f39508a59"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/93bdf715d33cf5ee01c58e8546c2469c71ce082a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b7d77cb046b4487e8e511e04e62b6f416ce845c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c0def811ad8d642dca9b6d31a198cc39f5f90837"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfaf235d5a6b60cbf115a14a656946303ad007b7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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