firmware: arm_scmi: Validate BASE_ERROR_EVENT payload size

{
  "id": "7f9728702cfce9b28ae95f1e3c7a43c72ed716d459edb7672a509fe106cfd187",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-98892",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "firmware: arm_scmi: Validate BASE_ERROR_EVENT payload size",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Validate BASE_ERROR_EVENT payload size BASE_ERROR_EVENT carries a variable number of message reports, with the count encoded in error_status. The notification parser used that count without checking whether the received payload contained all reported entries. Reject truncated payloads before copying the report array.",
    "evidence": "cve:CVE-2026-98892",
    "products": [
      {
        "name": {
          "value": "Linux",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "Linux",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98892",
      "aliases": [
        "CVE-2026-98892"
      ],
      "metrics": [],
      "affected": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "585dfab3fb80e67b3a54790b3d5ef2991feb3950",
              "lessThan": "4a754704698017ced0b657c92b468035faad00ed",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "585dfab3fb80e67b3a54790b3d5ef2991feb3950",
              "lessThan": "28d65a0a46435d48b96b6943c518095dff1602a1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "585dfab3fb80e67b3a54790b3d5ef2991feb3950",
              "lessThan": "890a9c3bf9dae90dcabded9d8e10c708a13779f7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "585dfab3fb80e67b3a54790b3d5ef2991feb3950",
              "lessThan": "c0742f23ec13fb6f5e0cd884323467a6c127d3c2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "585dfab3fb80e67b3a54790b3d5ef2991feb3950",
              "lessThan": "bd8bc95ef2daa3bac56197cffcbf2d4c5ed42216",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "585dfab3fb80e67b3a54790b3d5ef2991feb3950",
              "lessThan": "cb77a50d1114c0c9e084176301a8e094d383edfa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "585dfab3fb80e67b3a54790b3d5ef2991feb3950",
              "lessThan": "56e7e64cdd0e7209a58c8ec66028d63387402919",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/firmware/arm_scmi/base.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.9"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.9",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/firmware/arm_scmi/base.c"
          ],
          "defaultStatus": "affected"
        }
      ],
      "modified": "2026-10-26T06:56:18.073Z",
      "provider": "cve",
      "references": [
        "https://git.kernel.org/stable/c/4a754704698017ced0b657c92b468035faad00ed",
        "https://git.kernel.org/stable/c/28d65a0a46435d48b96b6943c518095dff1602a1",
        "https://git.kernel.org/stable/c/890a9c3bf9dae90dcabded9d8e10c708a13779f7",
        "https://git.kernel.org/stable/c/c0742f23ec13fb6f5e0cd884323467a6c127d3c2",
        "https://git.kernel.org/stable/c/bd8bc95ef2daa3bac56197cffcbf2d4c5ed42216",
        "https://git.kernel.org/stable/c/cb77a50d1114c0c9e084176301a8e094d383edfa",
        "https://git.kernel.org/stable/c/56e7e64cdd0e7209a58c8ec66028d63387402919"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "shortName": "Linux",
          "dateUpdated": "2026-10-26T06:56:18.073Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98892",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-cve",
  "document_id": 263350,
  "published_at": "2026-10-23T11:37:52.692+00:00"
}