efi: runtime: Fix potential overflow of soft-reserved region size

{
  "id": "2ea9a05c14d59cac34a72350d2af23e168e759341fdd7b00131dea4250d46e9c",
  "url": "https://osv.dev/vulnerability/CVE-2024-26843",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "efi: runtime: Fix potential overflow of soft-reserved region size",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: efi: runtime: Fix potential overflow of soft-reserved region size md_size will have been narrowed if we have >= 4GB worth of pages in a soft-reserved region.",
    "evidence": "osv:CVE-2024-26843",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.10.211",
            "evidence": "/affected/1/ranges"
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          {
            "value": "5.15.150",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.80",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.19",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.7.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-26843",
      "aliases": [
        "CVE-2024-26843"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H"
        }
      ],
      "affected": [
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                  "fixed": "700c3f642c32721f246e09d3a9511acf40ae42be"
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                {
                  "fixed": "cf3d6813601fe496de7f023435e31bfffa74ae70"
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                {
                  "fixed": "156cb12ffdcf33883304f0db645e1eadae712fe0"
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                  "fixed": "de1034b38a346ef6be25fe8792f5d1e0684d5ff4"
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26843.json"
          }
        },
        {
          "ranges": [
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              "type": "ECOSYSTEM",
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26843.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.990731926Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/156cb12ffdcf33883304f0db645e1eadae712fe0",
        "https://git.kernel.org/stable/c/4aa36b62c3eaa869860bf78b1146e9f2b5f782a9",
        "https://git.kernel.org/stable/c/4fff3d735baea104017f2e3c245e27cdc79f2426",
        "https://git.kernel.org/stable/c/700c3f642c32721f246e09d3a9511acf40ae42be",
        "https://git.kernel.org/stable/c/cf3d6813601fe496de7f023435e31bfffa74ae70",
        "https://git.kernel.org/stable/c/de1034b38a346ef6be25fe8792f5d1e0684d5ff4",
        "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26843.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-26843",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26843.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-26843",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 513992,
  "published_at": "2024-04-17T10:10:08.089+00:00"
}