CVE-2026-93080 (GCVE-0-2026-93080)
Vulnerability from cvelistv5
Published
2026-09-17 16:11
Modified
2026-10-19 09:05
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix transport device teardown lookup SCMI transport devices are deliberately excluded from normal SCMI bus matching so protocol drivers cannot bind to the internal transport children. However, scmi_device_destroy() uses the same protocol/name lookup to find devices that must be unregistered during channel teardown. Split the match helper so driver matching still skips transport devices, while explicit child lookup can find them for teardown. Use a shared transport-device name prefix macro for both matching and name generation. Since transport-device names are derived from direction and protocol ID, reject duplicate protocol channel setup before creating or finding a transport device. This prevents malformed firmware with duplicate protocol child nodes from reusing an existing transport device and then destroying it when the duplicate IDR insertion fails.
References
Impacted products
Vendor Product Version
Linux Linux Version: 9593804c44c24545e1b0496786dcb765d7b0e193
Version: 9593804c44c24545e1b0496786dcb765d7b0e193
Version: 9593804c44c24545e1b0496786dcb765d7b0e193
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/arm_scmi/bus.c",
            "drivers/firmware/arm_scmi/common.h",
            "drivers/firmware/arm_scmi/driver.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/arm_scmi/bus.c",
            "drivers/firmware/arm_scmi/common.h",
            "drivers/firmware/arm_scmi/driver.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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          "nodes": [
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Fix transport device teardown lookup\n\nSCMI transport devices are deliberately excluded from normal SCMI bus\nmatching so protocol drivers cannot bind to the internal transport\nchildren. However, scmi_device_destroy() uses the same protocol/name\nlookup to find devices that must be unregistered during channel teardown.\n\nSplit the match helper so driver matching still skips transport devices,\nwhile explicit child lookup can find them for teardown. Use a shared\ntransport-device name prefix macro for both matching and name generation.\n\nSince transport-device names are derived from direction and protocol ID,\nreject duplicate protocol channel setup before creating or finding a\ntransport device. This prevents malformed firmware with duplicate\nprotocol child nodes from reusing an existing transport device and then\ndestroying it when the duplicate IDR insertion fails."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:05:16.032Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c656427440ea627166394d00c4b72147d5d79c60"
        },
        {
          "url": "https://git.kernel.org/stable/c/4635953b4c1af477e166073521a77de6279f6929"
        },
        {
          "url": "https://git.kernel.org/stable/c/a14dd8fe0a95db638c550ed984cfe2a7428c783d"
        }
      ],
      "title": "firmware: arm_scmi: Fix transport device teardown lookup",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93080",
    "datePublished": "2026-09-17T16:11:01.005Z",
    "dateReserved": "2026-09-17T15:57:05.662Z",
    "dateUpdated": "2026-10-19T09:05:16.032Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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