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FKIE_CVE-2026-46246

Vulnerability from fkie_nvd - Published: 2026-06-03 18:16 - Updated: 2026-07-22 20:10
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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/23067259919663580c6f81801847cfc7bd54fd1fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/47abfc207ab02cf1297257e282e8048da63f0d08Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/48e0f68b50c344bb2d78d65dd98f93e41276ee00Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9fab0120907e6965168e55b1e17cb9dfaf262b86Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/power/supply/pm8916_lbc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9fab0120907e6965168e55b1e17cb9dfaf262b86",
              "status": "affected",
              "version": "f8d7a3d21160a0cab4d15b81231f2a76b0fcee13",
              "versionType": "git"
            },
            {
              "lessThan": "47abfc207ab02cf1297257e282e8048da63f0d08",
              "status": "affected",
              "version": "f8d7a3d21160a0cab4d15b81231f2a76b0fcee13",
              "versionType": "git"
            },
            {
              "lessThan": "48e0f68b50c344bb2d78d65dd98f93e41276ee00",
              "status": "affected",
              "version": "f8d7a3d21160a0cab4d15b81231f2a76b0fcee13",
              "versionType": "git"
            },
            {
              "lessThan": "23067259919663580c6f81801847cfc7bd54fd1f",
              "status": "affected",
              "version": "f8d7a3d21160a0cab4d15b81231f2a76b0fcee13",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/power/supply/pm8916_lbc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2",
              "versionEndExcluding": "6.12.75",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "BF463CB7-1F58-4607-B847-77ED23E4B9B7",
              "versionEndExcluding": "6.18.14",
              "versionStartIncluding": "6.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "672A3E79-EC03-479D-8503-361DFBDC8092",
              "versionEndExcluding": "6.19.4",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\npower: supply: pm8916_lbc: Correcci\u00f3n de uso despu\u00e9s de liberaci\u00f3n para extcon en el gestor IRQ\n\nUsar la variante \u0027devm_\u0027 para solicitar IRQ _antes_ de la variante \u0027devm_\u0027 para asignar/registrar el manejador \u0027extcon\u0027, significa que el manejador \u0027extcon\u0027 ser\u00e1 desasignado/dado de baja _antes_ del gestor de interrupciones (ya que \u0027devm_\u0027 desasigna naturalmente en orden inverso de asignaci\u00f3n). Esto significa que durante la eliminaci\u00f3n, hay una condici\u00f3n de carrera donde una interrupci\u00f3n puede dispararse justo _despu\u00e9s_ de que el manejador \u0027extcon\u0027 haya sido liberado, pero justo _antes_ de que se haya ejecutado la correspondiente anulaci\u00f3n de registro del gestor IRQ.\n\nEsto llevar\u00e1 a que el gestor IRQ llame a \u0027extcon_set_state_sync()\u0027 con un manejador \u0027extcon\u0027 liberado. Lo que usualmente bloquea el sistema o de otra manera corrompe silenciosamente la memoria...\n\nCorrige este uso despu\u00e9s de liberaci\u00f3n propenso a condiciones de carrera asegur\u00e1ndose de que la IRQ sea solicitada _despu\u00e9s_ del registro del manejador \u0027extcon\u0027."
    }
  ],
  "id": "CVE-2026-46246",
  "lastModified": "2026-07-22T20:10:00.127",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-06-03T18:16:24.793",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/23067259919663580c6f81801847cfc7bd54fd1f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/47abfc207ab02cf1297257e282e8048da63f0d08"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/48e0f68b50c344bb2d78d65dd98f93e41276ee00"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/9fab0120907e6965168e55b1e17cb9dfaf262b86"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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