firmware: arm_scmi: Fix list protocols enumeration in the base protocol

{
  "id": "f233b28026cae89b8b7d243aa3c65eef7f355a7f6000faee472ca31fef66c3c6",
  "url": "https://osv.dev/vulnerability/CVE-2022-49451",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "firmware: arm_scmi: Fix list protocols enumeration in the base protocol",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix list protocols enumeration in the base protocol While enumerating protocols implemented by the SCMI platform using BASE_DISCOVER_LIST_PROTOCOLS, the number of returned protocols is currently validated in an improper way since the check employs a sum between unsigned integers that could overflow and cause the check itself to be silently bypassed if the returned value 'loop_num_ret' is big enough. Fix the validation avoiding the addition.",
    "evidence": "osv:CVE-2022-49451",
    "products": [
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    "severity": "high",
    "structured": {
      "id": "CVE-2022-49451",
      "aliases": [
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      "metrics": [
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          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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            "ecosystem": "Linux"
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      "modified": "2026-10-28T02:30:36.926397652Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1052f22e127d0c34c3387bb389424ba1c61491ff",
        "https://git.kernel.org/stable/c/2ccfcd7a09c826516edcfe464b05071961aada3f",
        "https://git.kernel.org/stable/c/444a2d27fe9867d0da4b28fc45b793f32e099ab8",
        "https://git.kernel.org/stable/c/6e7978695f4a6cbd83616b5a702b77fa2087b247",
        "https://git.kernel.org/stable/c/8009120e0354a67068e920eb10dce532391361d0",
        "https://git.kernel.org/stable/c/98342148a8cd242855d7e257f298c966c96dba9f",
        "https://git.kernel.org/stable/c/b0e4bafac8963c2d85ee18d3d01f393735acceec",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49451.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49451",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 504080,
  "published_at": "2025-02-26T02:13:01.077+00:00"
}