CVE-2025-68324 (GCVE-0-2025-68324)

Vulnerability from cvelistv5 – Published: 2025-12-18 15:02 – Updated: 2026-10-30 12:23
VLAI
Title
scsi: imm: Fix use-after-free bug caused by unfinished delayed work
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: imm: Fix use-after-free bug caused by unfinished delayed work The delayed work item 'imm_tq' is initialized in imm_attach() and scheduled via imm_queuecommand() for processing SCSI commands. When the IMM parallel port SCSI host adapter is detached through imm_detach(), the imm_struct device instance is deallocated. However, the delayed work might still be pending or executing when imm_detach() is called, leading to use-after-free bugs when the work function imm_interrupt() accesses the already freed imm_struct memory. The race condition can occur as follows: CPU 0(detach thread) | CPU 1 | imm_queuecommand() | imm_queuecommand_lck() imm_detach() | schedule_delayed_work() kfree(dev) //FREE | imm_interrupt() | dev = container_of(...) //USE dev-> //USE Add disable_delayed_work_sync() in imm_detach() to guarantee proper cancellation of the delayed work item before imm_struct is deallocated.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cfd561e8df5f46fc1c9d54885165a60e63831c14 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9a8e53154353580d53f7f86a253927e41294017e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 31ab2aad7a7b7501e904a09bf361e44671f66092 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 48dd41fa2d6c6a0c50e714deeba06ffe7f91961b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9e434426cc23ad5e2aad649327b59aea00294b13 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ab58153ec64fa3fc9aea09ca09dc9322e0b54a7c (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.63 , ≤ 6.12.* (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: imm: Fix use-after-free bug caused by unfinished delayed work\n\nThe delayed work item \u0027imm_tq\u0027 is initialized in imm_attach() and\nscheduled via imm_queuecommand() for processing SCSI commands.  When the\nIMM parallel port SCSI host adapter is detached through imm_detach(),\nthe imm_struct device instance is deallocated.\n\nHowever, the delayed work might still be pending or executing\nwhen imm_detach() is called, leading to use-after-free bugs\nwhen the work function imm_interrupt() accesses the already\nfreed imm_struct memory.\n\nThe race condition can occur as follows:\n\nCPU 0(detach thread)   | CPU 1\n                       | imm_queuecommand()\n                       |   imm_queuecommand_lck()\nimm_detach()           |     schedule_delayed_work()\n  kfree(dev) //FREE    | imm_interrupt()\n                       |   dev = container_of(...) //USE\n                           dev-\u003e //USE\n\nAdd disable_delayed_work_sync() in imm_detach() to guarantee proper\ncancellation of the delayed work item before imm_struct is deallocated."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:23:13.712Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/cfd561e8df5f46fc1c9d54885165a60e63831c14"
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          "url": "https://git.kernel.org/stable/c/9a8e53154353580d53f7f86a253927e41294017e"
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          "url": "https://git.kernel.org/stable/c/ab58153ec64fa3fc9aea09ca09dc9322e0b54a7c"
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    "cveId": "CVE-2025-68324",
    "datePublished": "2025-12-18T15:02:49.230Z",
    "dateReserved": "2025-12-16T14:48:05.296Z",
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    "state": "PUBLISHED"
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      "id": "msrc_CVE-2025-68324",
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      "product_status:known_affected": "9",
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      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "scsi: imm: Fix use-after-free bug caused by unfinished delayed work",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-68324.json",
      "version": "11"
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                "product": "Linux",
                "programFiles": [
                  "drivers/scsi/imm.c"
                ],
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                "vendor": "Linux",
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: imm: Fix use-after-free bug caused by unfinished delayed work\n\nThe delayed work item \u0027imm_tq\u0027 is initialized in imm_attach() and\nscheduled via imm_queuecommand() for processing SCSI commands.  When the\nIMM parallel port SCSI host adapter is detached through imm_detach(),\nthe imm_struct device instance is deallocated.\n\nHowever, the delayed work might still be pending or executing\nwhen imm_detach() is called, leading to use-after-free bugs\nwhen the work function imm_interrupt() accesses the already\nfreed imm_struct memory.\n\nThe race condition can occur as follows:\n\nCPU 0(detach thread)   | CPU 1\n                       | imm_queuecommand()\n                       |   imm_queuecommand_lck()\nimm_detach()           |     schedule_delayed_work()\n  kfree(dev) //FREE    | imm_interrupt()\n                       |   dev = container_of(...) //USE\n                           dev-\u003e //USE\n\nAdd disable_delayed_work_sync() in imm_detach() to guarantee proper\ncancellation of the delayed work item before imm_struct is deallocated."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nscsi: imm: Correcci\u00f3n de error de uso despu\u00e9s de liberaci\u00f3n causado por trabajo retrasado sin finalizar\n\nEl elemento de trabajo retrasado \u0027imm_tq\u0027 se inicializa en imm_attach() y se programa a trav\u00e9s de imm_queuecommand() para procesar comandos SCSI. Cuando el adaptador de host SCSI de puerto paralelo IMM se desvincula mediante imm_detach(), la instancia del dispositivo imm_struct se desasigna.\n\nSin embargo, el trabajo retrasado podr\u00eda seguir pendiente o ejecut\u00e1ndose cuando se llama a imm_detach(), lo que lleva a errores de uso despu\u00e9s de liberaci\u00f3n cuando la funci\u00f3n de trabajo imm_interrupt() accede a la memoria imm_struct ya liberada.\n\nLa condici\u00f3n de carrera puede ocurrir de la siguiente manera:\n\nCPU 0(detach thread)   | CPU 1\n                       | imm_queuecommand()\n                       |   imm_queuecommand_lck()\nimm_detach()           |     schedule_delayed_work()\n  kfree(dev) //FREE    | imm_interrupt()\n                       |   dev = container_of(...) //USE\n                           dev -\u003e  //USE\n\nA\u00f1adir disable_delayed_work_sync() en imm_detach() para garantizar la cancelaci\u00f3n adecuada del elemento de trabajo retrasado antes de que imm_struct sea desasignado."
          }
        ],
        "id": "CVE-2025-68324",
        "lastModified": "2026-10-30T13:18:20.967",
        "metrics": {},
        "published": "2025-12-18T15:16:06.220",
        "references": [
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T01:34:53+00:00",
      "cve": "CVE-2025-68324",
      "id": "CVE-2025-68324",
      "initial_release_date": "2025-12-18T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service via use-after-free in IMM SCSI host adapter",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68324.json",
      "version": "3"
    }
  }
}



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