GHSA-MJ3C-JC9W-939M

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: goldfish: Fix use-after-free in power_supply_changed()

Using the devm_ variant for requesting IRQ before the devm_ variant for allocating/registering the power_supply handle, means that the power_supply handle will be deallocated/unregistered before the interrupt handler (since devm_ naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just after the power_supply handle has been freed, but just before the corresponding unregistration of the IRQ handler has run.

This will lead to the IRQ handler calling power_supply_changed() with a freed power_supply handle. Which usually crashes the system or otherwise silently corrupts the memory...

Note that there is a similar situation which can also happen during probe(); the possibility of an interrupt firing before registering the power_supply handle. This would then lead to the nasty situation of using the power_supply handle uninitialized in power_supply_changed().

Fix this racy use-after-free by making sure the IRQ is requested after the registration of the power_supply handle.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-45936"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:09Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: goldfish: Fix use-after-free in power_supply_changed()\n\nUsing the `devm_` variant for requesting IRQ _before_ the `devm_`\nvariant for allocating/registering the `power_supply` handle, means that\nthe `power_supply` handle will be deallocated/unregistered _before_ the\ninterrupt handler (since `devm_` naturally deallocates in reverse\nallocation order). This means that during removal, there is a race\ncondition where an interrupt can fire just _after_ the `power_supply`\nhandle has been freed, *but* just _before_ the corresponding\nunregistration of the IRQ handler has run.\n\nThis will lead to the IRQ handler calling `power_supply_changed()` with\na freed `power_supply` handle. Which usually crashes the system or\notherwise silently corrupts the memory...\n\nNote that there is a similar situation which can also happen during\n`probe()`; the possibility of an interrupt firing _before_ registering\nthe `power_supply` handle. This would then lead to the nasty situation\nof using the `power_supply` handle *uninitialized* in\n`power_supply_changed()`.\n\nFix this racy use-after-free by making sure the IRQ is requested _after_\nthe registration of the `power_supply` handle.",
  "id": "GHSA-mj3c-jc9w-939m",
  "modified": "2026-05-27T15:33:17Z",
  "published": "2026-05-27T15:33:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45936"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b29ffe4090a3fc7a7649de20e1eb1e53adddac7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33751e28842bf5aee5ef7b2b8d5e456a069095cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4350505e82b4f972ddb788e1c712c557c38859d0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/589d4fe56713c6344cd9f8939f9c7621c85f0966"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77ea437faa4c06362e3ecfd2d7264eaa7ac1e82c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c89aade8335e26a6a7dcda18992d15f51943927"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2ce982e2e0c888dc55c888ad0e20ea04daf2e6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bad8b61eb5059acd88349680e47839342dc89e94"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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