CVE-2026-98168 (GCVE-0-2026-98168)
Vulnerability from cvelistv5
Published
2026-10-06 08:44
Modified
2026-10-21 12:54
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix reparse buffer bounds in cifs_query_reparse_point() In cifs_query_reparse_point(), the start >= end check before casting to struct reparse_data_buffer * only ensures the start pointer is within the response. It fails to verify that there is enough space remaining for the fixed 8-byte header of the structure. If a server provides a DataOffset that leaves less than 8 bytes remaining, the check passes, but subsequent reads of ReparseTag and ReparseDataLength will occur out-of-bounds. Fix this by ensuring the remaining space is at least the size of the reparse_data_buffer structure before accessing its fields.
References
Impacted products
Vendor Product Version
Linux Linux Version: 848d78e3625f15de09d34a562dc49a98b78a62f3
Version: 48ca7139ab7f0bbed95ff7a901ea497017769657
Version: 56e84c64fc257a95728ee73165456b025c48d408
Version: 56e84c64fc257a95728ee73165456b025c48d408
Version: 56e84c64fc257a95728ee73165456b025c48d408
Version: c13b779d26b3702fba8f7d5fe757aba5bda85fd0
Version: 6.6.94   ≤
Version: 6.12.34   ≤
Version: 6.15.3   ≤
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix reparse buffer bounds in cifs_query_reparse_point()\n\nIn cifs_query_reparse_point(), the start \u003e= end check before casting to\nstruct reparse_data_buffer * only ensures the start pointer is within the\nresponse. It fails to verify that there is enough space remaining for the\nfixed 8-byte header of the structure.\n\nIf a server provides a DataOffset that leaves less than 8 bytes remaining,\nthe check passes, but subsequent reads of ReparseTag and ReparseDataLength\nwill occur out-of-bounds.\n\nFix this by ensuring the remaining space is at least the size of the\nreparse_data_buffer structure before accessing its fields."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:54:47.190Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/aa00eead258e4fe8158a3a3e2d65facf06274abd"
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        {
          "url": "https://git.kernel.org/stable/c/3d67f155fe5813cfb02a551a9a12d6ea06a902e9"
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        },
        {
          "url": "https://git.kernel.org/stable/c/5f0306e731e2f46e91419eae57eee3a241c055e0"
        }
      ],
      "title": "smb: client: fix reparse buffer bounds in cifs_query_reparse_point()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98168",
    "datePublished": "2026-10-06T08:44:13.534Z",
    "dateReserved": "2026-09-25T10:25:14.321Z",
    "dateUpdated": "2026-10-21T12:54:47.190Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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