CVE-2026-23306 (GCVE-0-2026-23306)
Vulnerability from cvelistv5
Published
2026-03-25 10:27
Modified
2026-08-05 12:21
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: scsi: pm8001: Fix use-after-free in pm8001_queue_command() Commit e29c47fe8946 ("scsi: pm8001: Simplify pm8001_task_exec()") refactors pm8001_queue_command(), however it introduces a potential cause of a double free scenario when it changes the function to return -ENODEV in case of phy down/device gone state. In this path, pm8001_queue_command() updates task status and calls task_done to indicate to upper layer that the task has been handled. However, this also frees the underlying SAS task. A -ENODEV is then returned to the caller. When libsas sas_ata_qc_issue() receives this error value, it assumes the task wasn't handled/queued by LLDD and proceeds to clean up and free the task again, resulting in a double free. Since pm8001_queue_command() handles the SAS task in this case, it should return 0 to the caller indicating that the task has been handled.
References
Impacted products
Vendor Product Version
Linux Linux Version: e29c47fe8946cc732b0e0d393b65b13c84bb69d0
Version: e29c47fe8946cc732b0e0d393b65b13c84bb69d0
Version: e29c47fe8946cc732b0e0d393b65b13c84bb69d0
Version: e29c47fe8946cc732b0e0d393b65b13c84bb69d0
Version: e29c47fe8946cc732b0e0d393b65b13c84bb69d0
Version: e29c47fe8946cc732b0e0d393b65b13c84bb69d0
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: pm8001: Fix use-after-free in pm8001_queue_command()\n\nCommit e29c47fe8946 (\"scsi: pm8001: Simplify pm8001_task_exec()\") refactors\npm8001_queue_command(), however it introduces a potential cause of a double\nfree scenario when it changes the function to return -ENODEV in case of phy\ndown/device gone state.\n\nIn this path, pm8001_queue_command() updates task status and calls\ntask_done to indicate to upper layer that the task has been handled.\nHowever, this also frees the underlying SAS task. A -ENODEV is then\nreturned to the caller. When libsas sas_ata_qc_issue() receives this error\nvalue, it assumes the task wasn\u0027t handled/queued by LLDD and proceeds to\nclean up and free the task again, resulting in a double free.\n\nSince pm8001_queue_command() handles the SAS task in this case, it should\nreturn 0 to the caller indicating that the task has been handled."
        }
      ],
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The pm8001 is a PCI-based SAS/SATA host bus adapter driver. Triggering this vulnerability requires local access to submit SCSI/ATA commands to a device managed by this HBA, which is done through local SCSI device interfaces.\nAC:L - The vulnerability triggers deterministically when I/O is submitted to a SATA device that is in the \"gone\" state. The attacker can control the device removal (e.g., by physically disconnecting a SATA drive or through hotplug) and then issue I/O, reliably triggering the double-free.\nPR:L - Submitting SCSI commands requires access to SCSI device files (e.g., /dev/sdX), which typically requires at least basic user-level access with appropriate device permissions. Root is not strictly required if the user has group access to the device.\nUI:N - No user interaction is required. The attacker can trigger the vulnerability by issuing I/O commands to a gone device independently.\nS:U - The vulnerability affects the kernel within its own security authority. There is no crossing of a security boundary such as a VM escape or sandbox escape.\nC:H - A double-free on slab memory (kmem_cache) is a powerful exploitation primitive. Through heap spraying, an attacker can control the contents of the reallocated object, potentially achieving arbitrary kernel memory read capabilities.\nI:H - The double-free allows an attacker to reclaim the freed slab object with controlled data, enabling type confusion and arbitrary kernel memory write primitives that can lead to code execution.\nA:H - The double-free will at minimum cause a kernel crash/panic when the slab allocator detects corruption, and can also be used to cause repeated crashes for denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:21:11.431Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/ebbb852ffbc952b95ddb7e3872b67b3e74c6da47"
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        {
          "url": "https://git.kernel.org/stable/c/8b00427317ba7b7ec91252b034009f638d0f311b"
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          "url": "https://git.kernel.org/stable/c/c5dc39f8ae055520fd778b7fb0423f11586f15c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/824a7672e3540962d5c77d4c6666254d7aa6f0b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/227ff4af00abc40b95123cc27ee8079069dcd8d7"
        },
        {
          "url": "https://git.kernel.org/stable/c/38353c26db28efd984f51d426eac2396d299cca7"
        }
      ],
      "title": "scsi: pm8001: Fix use-after-free in pm8001_queue_command()",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23306",
    "datePublished": "2026-03-25T10:27:01.719Z",
    "dateReserved": "2026-01-13T15:37:45.993Z",
    "dateUpdated": "2026-08-05T12:21:11.431Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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