CVE-2026-93085 (GCVE-0-2026-93085)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:11 – Updated: 2026-09-17 16:11
VLAI
Title
firmware: arm_scmi: Reject out of range DT protocol IDs
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 , < 8eb2ab209570526728b35e39c4aecdb5099fbaf7 (git)
Affected: 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 , < 5142fd31bd8c9aff9bad4f6e0cc20e9574f2cee1 (git)
Affected: 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 , < e66756313d1b4eadd13f39a0aee9fc8773d4d375 (git)
Affected: 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 , < 0b6e59eb885f985a5ea7beed385adfa9412b324d (git)
Affected: 05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 , < 59407ccb52130f2c81f4b3cbe4f14114afceb54f (git)
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Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
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          "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": "2026-09-17T16:11:04.355Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/59407ccb52130f2c81f4b3cbe4f14114afceb54f"
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      "title": "firmware: arm_scmi: Reject out of range DT protocol IDs",
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    "cveId": "CVE-2026-93085",
    "datePublished": "2026-09-17T16:11:04.355Z",
    "dateReserved": "2026-09-17T15:57:05.662Z",
    "dateUpdated": "2026-09-17T16:11:04.355Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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            "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."
          }
        ],
        "id": "CVE-2026-93085",
        "lastModified": "2026-09-17T17:18:02.590",
        "metrics": {},
        "published": "2026-09-17T17:18:02.590",
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        "vulnStatus": "Received"
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    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-18T00:12:24Z",
      "cve": "CVE-2026-93085",
      "id": "CVE-2026-93085",
      "initial_release_date": "2026-09-18T00:12:24Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-93085",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-93085.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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