GHSA-VJ56-8X44-C882

Vulnerability from github – Published: 2026-06-03 18:33 – Updated: 2026-06-05 09:33
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

power: supply: rt9455: 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.

Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-46270"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-03T18:16:28Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: rt9455: 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-vj56-8x44-c882",
  "modified": "2026-06-05T09:33:46Z",
  "published": "2026-06-03T18:33:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46270"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2178dc65d45e2f7bcaa8af8d80d100419bdab251"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/62d753b916bd500bb269b7078cdab73198ab4718"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64e15155095f39f4dec9b4659da1238ef8fc54d4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/721449a15170fc5f028a7576d7f65b9f60d53482"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a39f8f06216f73ef40e71e2fe4ad071964c1fd36"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/af261f218a7606f93d2c786353d60bb4feb56ef0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2febe375e5ea5afed92f4cd9711bde8f24ee6d2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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