CVE-2026-93085 (GCVE-0-2026-93085)
Vulnerability from cvelistv5
Published
2026-09-17 16:11
Modified
2026-10-30 12:35
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Reject out of range DT protocol IDs SCMI protocol IDs carried in message headers are limited by MSG_PROTOCOL_ID_MASK. The DT parsing paths noticed protocol IDs outside that range, but only logged an error and then kept processing the invalid value. That lets a malformed 32-bit DT reg value reach helpers which take a u8 protocol ID, where it can be truncated and/or treated as a different protocol. For channel setup, two different out-of-range values can also be used as distinct IDR keys while aliasing the generated SCMI protocol identity. Skip DT protocol nodes whose reg value does not fit the SCMI protocol ID field before setting up channels or creating protocol devices.
References
Impacted products
Vendor Product Version
Linux Linux Version: 22f7f35fd71b597a5d916e41d7646be6ee530c86
Version: 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1
Version: 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1
Version: 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1
Version: 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1
Version: 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/arm_scmi/driver.c"
          ],
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          "programFiles": [
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          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
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          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                },
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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\nfirmware: arm_scmi: Reject out of range DT protocol IDs\n\nSCMI protocol IDs carried in message headers are limited by\nMSG_PROTOCOL_ID_MASK. The DT parsing paths noticed protocol IDs\noutside that range, but only logged an error and then kept processing\nthe invalid value.\n\nThat lets a malformed 32-bit DT reg value reach helpers which take a u8\nprotocol ID, where it can be truncated and/or treated as a different\nprotocol.\n\nFor channel setup, two different out-of-range values can also be used as\ndistinct IDR keys while aliasing the generated SCMI protocol identity.\n\nSkip DT protocol nodes whose reg value does not fit the SCMI protocol ID\nfield before setting up channels or creating protocol devices."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:35:51.790Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/75d6273a28cdb543a167ac5fbfca75dc286ffe10"
        },
        {
          "url": "https://git.kernel.org/stable/c/8eb2ab209570526728b35e39c4aecdb5099fbaf7"
        },
        {
          "url": "https://git.kernel.org/stable/c/5142fd31bd8c9aff9bad4f6e0cc20e9574f2cee1"
        },
        {
          "url": "https://git.kernel.org/stable/c/e66756313d1b4eadd13f39a0aee9fc8773d4d375"
        },
        {
          "url": "https://git.kernel.org/stable/c/0b6e59eb885f985a5ea7beed385adfa9412b324d"
        },
        {
          "url": "https://git.kernel.org/stable/c/59407ccb52130f2c81f4b3cbe4f14114afceb54f"
        }
      ],
      "title": "firmware: arm_scmi: Reject out of range DT protocol IDs",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93085",
    "datePublished": "2026-09-17T16:11:04.355Z",
    "dateReserved": "2026-09-17T15:57:05.662Z",
    "dateUpdated": "2026-10-30T12:35:51.790Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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