cifs: fix small mempool leak in SMB2_negotiate()

{
  "id": "ddcf8982b34a9413d01e8ff1bff9e4a42d9d0b715e4040cb4edbd7b034a56486",
  "url": "https://osv.dev/vulnerability/CVE-2022-49938",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "cifs: fix small mempool leak in SMB2_negotiate()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: cifs: fix small mempool leak in SMB2_negotiate() In some cases of failure (dialect mismatches) in SMB2_negotiate(), after the request is sent, the checks would return -EIO when they should be rather setting rc = -EIO and jumping to neg_exit to free the response buffer from mempool.",
    "evidence": "osv:CVE-2022-49938",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.15.66",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.19.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-49938",
      "aliases": [
        "CVE-2022-49938"
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      "affected": [
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            "v4.13.15",
            "v4.13.14",
            "v4.13.13",
            "v4.13.12",
            "v4.13.11",
            "v4.13.10",
            "v4.13.9",
            "v4.13.8",
            "v4.13.7",
            "v4.13.6",
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        },
        {
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              "type": "ECOSYSTEM",
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            "name": "Kernel",
            "ecosystem": "Linux"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49938.json"
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      ],
      "modified": "2026-10-28T02:30:24.072418338Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/27893dfc1285f80f80f46b3b8c95f5d15d2e66d0",
        "https://git.kernel.org/stable/c/38a6b469bf22f153282fbe7d702a24e9eb43f50e",
        "https://git.kernel.org/stable/c/9e3c9efa7caf16e5acc05eab5e4d0a714e1610b0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49938.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49938",
        "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/2022/49xxx/CVE-2022-49938.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49938",
        "evidence": "/id"
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    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 490311,
  "published_at": "2025-06-18T10:54:39.458+00:00"
}