FKIE_CVE-2026-46246

Vulnerability from fkie_nvd - Published: 2026-06-03 18:16 - Updated: 2026-06-05 20:51
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `extcon` handle, means that the `extcon` 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 `extcon` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `extcon_set_state_sync()` with a freed `extcon` handle. Which usually crashes the system or otherwise silently corrupts the memory... Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `extcon` handle.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/23067259919663580c6f81801847cfc7bd54fd1f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/47abfc207ab02cf1297257e282e8048da63f0d08
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/48e0f68b50c344bb2d78d65dd98f93e41276ee00
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9fab0120907e6965168e55b1e17cb9dfaf262b86
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler\n\nUsing the `devm_` variant for requesting IRQ _before_ the `devm_`\nvariant for allocating/registering the `extcon` handle, means that the\n`extcon` handle will be deallocated/unregistered _before_ the interrupt\nhandler (since `devm_` naturally deallocates in reverse allocation\norder). This means that during removal, there is a race condition where\nan interrupt can fire just _after_ the `extcon` handle has been\nfreed, *but* just _before_ the corresponding unregistration of the IRQ\nhandler has run.\n\nThis will lead to the IRQ handler calling `extcon_set_state_sync()` with\na freed `extcon` handle. Which usually crashes the system or otherwise\nsilently corrupts the memory...\n\nFix this racy use-after-free by making sure the IRQ is requested _after_\nthe registration of the `extcon` handle."
    }
  ],
  "id": "CVE-2026-46246",
  "lastModified": "2026-06-05T20:51:20.400",
  "metrics": {},
  "published": "2026-06-03T18:16:24.793",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/23067259919663580c6f81801847cfc7bd54fd1f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/47abfc207ab02cf1297257e282e8048da63f0d08"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/48e0f68b50c344bb2d78d65dd98f93e41276ee00"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9fab0120907e6965168e55b1e17cb9dfaf262b86"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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