misc: fastrpc: Fix copy buffer page size

{
  "id": "62c9d437615e65f4358644f8ff0bb2d4566adab3a373e965d564be63a25c272a",
  "url": "https://osv.dev/vulnerability/CVE-2025-21734",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "misc: fastrpc: Fix copy buffer page size",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Fix copy buffer page size For non-registered buffer, fastrpc driver copies the buffer and pass it to the remote subsystem. There is a problem with current implementation of page size calculation which is not considering the offset in the calculation. This might lead to passing of improper and out-of-bounds page size which could result in memory issue. Calculate page start and page end using the offset adjusted address instead of absolute address.",
    "evidence": "osv:CVE-2025-21734",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.1.129",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.78",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.14",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.3",
            "evidence": "/affected/1/ranges"
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        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-21734",
      "aliases": [
        "CVE-2025-21734"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
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                  "fixed": "c0464bad0e85fcd5d47e4297d1e410097c979e55"
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              "type": "ECOSYSTEM",
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:26.815036577Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/24a79c6bc8de763f7c50f4f84f8b0c183bc25a51",
        "https://git.kernel.org/stable/c/c0464bad0e85fcd5d47e4297d1e410097c979e55",
        "https://git.kernel.org/stable/c/c3f7161123fcbdc64e90119ccce292d8b66281c4",
        "https://git.kernel.org/stable/c/c56ba3ea8e3c9a69a992aad18f7a65e43e51d623",
        "https://git.kernel.org/stable/c/e966eae72762ecfdbdb82627e2cda48845b9dd66",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21734.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21734",
        "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/2025/21xxx/CVE-2025-21734.json"
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        "value": "CVE-2025-21734",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493194,
  "published_at": "2025-02-27T02:12:11.663+00:00"
}