CVE-2025-68324 (GCVE-0-2025-68324)
Vulnerability from cvelistv5
Published
2025-12-18 15:02
Modified
2025-12-18 15:02
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/imm.c"
          ],
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          "vendor": "Linux",
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            },
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              "version": "0",
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              "status": "unaffected",
              "version": "6.12.63",
              "versionType": "semver"
            },
            {
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      "cpeApplicability": [
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              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
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      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-18T15:02:49.230Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/31ab2aad7a7b7501e904a09bf361e44671f66092"
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          "url": "https://git.kernel.org/stable/c/48dd41fa2d6c6a0c50e714deeba06ffe7f91961b"
        },
        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/ab58153ec64fa3fc9aea09ca09dc9322e0b54a7c"
        }
      ],
      "title": "scsi: imm: Fix use-after-free bug caused by unfinished delayed work",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68324",
    "datePublished": "2025-12-18T15:02:49.230Z",
    "dateReserved": "2025-12-16T14:48:05.296Z",
    "dateUpdated": "2025-12-18T15:02:49.230Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68324\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-18T15:16:06.220\",\"lastModified\":\"2025-12-19T18:00:54.283\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/31ab2aad7a7b7501e904a09bf361e44671f66092\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/48dd41fa2d6c6a0c50e714deeba06ffe7f91961b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9e434426cc23ad5e2aad649327b59aea00294b13\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ab58153ec64fa3fc9aea09ca09dc9322e0b54a7c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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