CVE-2026-46246 (GCVE-0-2026-46246)

Vulnerability from cvelistv5 – Published: 2026-06-03 15:49 – Updated: 2026-06-03 15:49
VLAI
Title
power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 , < 9fab0120907e6965168e55b1e17cb9dfaf262b86 (git)
Affected: f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 , < 47abfc207ab02cf1297257e282e8048da63f0d08 (git)
Affected: f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 , < 48e0f68b50c344bb2d78d65dd98f93e41276ee00 (git)
Affected: f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 , < 23067259919663580c6f81801847cfc7bd54fd1f (git)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/power/supply/pm8916_lbc.c"
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              "operator": "OR"
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      "descriptions": [
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          "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-03T15:49:41.607Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      ],
      "title": "power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46246",
    "datePublished": "2026-06-03T15:49:41.607Z",
    "dateReserved": "2026-05-13T15:03:33.107Z",
    "dateUpdated": "2026-06-03T15:49:41.607Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-46246\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-03T18:16:24.793\",\"lastModified\":\"2026-06-03T18:16:24.793\",\"vulnStatus\":\"Received\",\"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.\"}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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