CVE-2026-43378 smb: server: fix use-after-free in smb2_open()

[
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    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/server/smb2pdu.c"
    ],
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    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/server/smb2pdu.c"
    ],
    "versions": [
      {
        "version": "5.15",
        "status": "affected"
      },
      {
        "version": "0",
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        "status": "unaffected",
        "versionType": "semver"
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      {
        "version": "6.1.167",
        "lessThanOrEqual": "6.1.*",
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      },
      {
        "version": "6.6.130",
        "lessThanOrEqual": "6.6.*",
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      },
      {
        "version": "6.12.78",
        "lessThanOrEqual": "6.12.*",
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      },
      {
        "version": "6.18.19",
        "lessThanOrEqual": "6.18.*",
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      {
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      {
        "version": "7.0",
        "lessThanOrEqual": "*",
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        "versionType": "original_commit_for_fix"
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    ]
  }
]