CVE-2026-89623 (GCVE-0-2026-89623)
Vulnerability from cvelistv5
Published
2026-09-11 19:45
Modified
2026-10-24 14:14
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: mcp2221: stop device IO before hid_hw_stop Quiesce device IO at the start of the devm cleanup callback mcp2221_hid_unregister() so that incoming HID reports cannot race with hardware teardown during probe failure or device removal, addressing a potential use-after-free. Guard the call to hid_device_io_stop() with io_started. On normal removal hid_device_remove() has already cleared io_started before the devres group is released, so an unconditional call would otherwise hit the !io_started path and emit a spurious "io already stopped" warning on every removal. The guard preserves the probe-failure balancing, where io_started is still set after hid_device_io_start(), while staying silent on the normal removal path.
References
Impacted products
Vendor Product Version
Linux Linux Version: d4b50ac06ea6e47bdd2b04e97d1090c673c80645
Version: 73ce9f1f2741a38f5d27393e627702ae2c46e6f2
Version: 73ce9f1f2741a38f5d27393e627702ae2c46e6f2
Version: 73ce9f1f2741a38f5d27393e627702ae2c46e6f2
Version: 73ce9f1f2741a38f5d27393e627702ae2c46e6f2
Version: 6.6.8   ≤
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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-mcp2221.c"
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              "version": "7.2.4",
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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\nHID: mcp2221: stop device IO before hid_hw_stop\n\nQuiesce device IO at the start of the devm cleanup callback\nmcp2221_hid_unregister() so that incoming HID reports cannot race with\nhardware teardown during probe failure or device removal, addressing a\npotential use-after-free.\n\nGuard the call to hid_device_io_stop() with io_started. On normal\nremoval hid_device_remove() has already cleared io_started before the\ndevres group is released, so an unconditional call would otherwise hit\nthe !io_started path and emit a spurious \"io already stopped\" warning\non every removal. The guard preserves the probe-failure balancing,\nwhere io_started is still set after hid_device_io_start(), while\nstaying silent on the normal removal path."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-24T14:14:00.813Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/85d963499f1feeea287c0a37c3eac3fc1898eca9"
        },
        {
          "url": "https://git.kernel.org/stable/c/0ae90a19e6b5a8557d25d95facb7e01c9c07af38"
        },
        {
          "url": "https://git.kernel.org/stable/c/c99ba6c234d4d537c317336376b78c088174034a"
        },
        {
          "url": "https://git.kernel.org/stable/c/2eda1513f573945c1e3a0090341f3d28740463b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/dca151633c0fde90935311c60e7cfc064aa56134"
        }
      ],
      "title": "HID: mcp2221: stop device IO before hid_hw_stop",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89623",
    "datePublished": "2026-09-11T19:45:20.758Z",
    "dateReserved": "2026-09-11T19:38:34.737Z",
    "dateUpdated": "2026-10-24T14:14:00.813Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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