nfs: Fix KMSAN warning in decode_getfattr_attrs()

{
  "id": "91464a2adfe5b5b4f981757b55b68a05e811057b10c5d84fc3c8efb5fc5b7f26",
  "url": "https://osv.dev/vulnerability/CVE-2024-53066",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "nfs: Fix KMSAN warning in decode_getfattr_attrs()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: nfs: Fix KMSAN warning in decode_getfattr_attrs() Fix the following KMSAN warning: CPU: 1 UID: 0 PID: 7651 Comm: cp Tainted: G B Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009) ===================================================== ===================================================== BUG: KMSAN: uninit-value in decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_generic+0x806/0xb00 nfs4_xdr_dec_getattr+0x1de/0x240 rpcauth_unwrap_resp_decode+0xab/0x100 rpcauth_unwrap_resp+0x95/0xc0 call_decode+0x4ff/0xb50 __rpc_execute+0x57b/0x19d0 rpc_execute+0x368/0x5e0 rpc_run_task+0xcfe/0xee0 nfs4_proc_getattr+0x5b5/0x990 __nfs_revalidate_inode+0x477/0xd00 nfs_access_get_cached+0x1021/0x1cc0 nfs_do_access+0x9f/0xae0 nfs_permission+0x1e4/0x8c0 inode_permission+0x356/0x6c0 link_path_walk+0x958/0x1330 path_lookupat+0xce/0x6b0 filename_lookup+0x23e/0x770 vfs_statx+0xe7/0x970 vfs_fstatat+0x1f2/0x2c0 __se_sys_newfstatat+0x67/0x880 __x64_sys_newfstatat+0xbd/0x120 x64_sys_call+0x1826/0x3cf0 do_syscall_64+0xd0/0x1b0 entry_SYSCALL_64_after_hwframe+0x77/0x7f The KMSAN warning is triggered in decode_getfattr_attrs(), when calling decode_attr_mdsthreshold(). It appears that fattr->mdsthreshold is not initialized. Fix the issue by initializing fattr->mdsthreshold to NULL in nfs_fattr_init().",
    "evidence": "osv:CVE-2024-53066",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.19.324",
            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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          {
            "value": "6.1.117",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.61",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.11.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2024-53066",
      "aliases": [
        "CVE-2024-53066"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
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              "type": "GIT",
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                {
                  "fixed": "bbfcd261cc068fe1cd02a4e871275074a0daa4e2"
                },
                {
                  "fixed": "8fc5ea9231af9122d227c9c13f5e578fca48d2e3"
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                {
                  "fixed": "9b453e8b108a5a93a6e348cf2ba4c9c138314a00"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-53066.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "3.5.0"
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            {
              "type": "ECOSYSTEM",
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            {
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-53066.json"
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      ],
      "modified": "2026-10-28T02:30:23.220747079Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/25ffd294fef81a7f3cd9528adf21560c04d98747",
        "https://git.kernel.org/stable/c/8fc5ea9231af9122d227c9c13f5e578fca48d2e3",
        "https://git.kernel.org/stable/c/9b453e8b108a5a93a6e348cf2ba4c9c138314a00",
        "https://git.kernel.org/stable/c/9be0a21ae52b3b822d0eec4d14e909ab394f8a92",
        "https://git.kernel.org/stable/c/bbfcd261cc068fe1cd02a4e871275074a0daa4e2",
        "https://git.kernel.org/stable/c/dc270d7159699ad6d11decadfce9633f0f71c1db",
        "https://git.kernel.org/stable/c/f6b2b2b981af8e7d7c62d34143acefa4e1edfe8b",
        "https://git.kernel.org/stable/c/f749cb60a01f8391c760a1d6ecd938cadacf9549",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/53xxx/CVE-2024-53066.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-53066",
        "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/2024/53xxx/CVE-2024-53066.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-53066",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489411,
  "published_at": "2024-11-19T17:22:35.389+00:00"
}