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CVE-2026-64437 ksmbd: fix use-after-free of a deferred file_lock on SMB2_CLOSE then SMB2_CANCEL

🗓️ 25 Jul 2026 08:51:11Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 33 Views

ksmbd fixes use-after-free of a deferred file_lock on SMB2_CLOSE then SMB2_CANCEL.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/server/smb2pdu.c"
    ],
    "versions": [
      {
        "version": "b7063c7426ea5a4d15e01b60538718765392f49d",
        "lessThan": "a796ba4e61d5e14e07b79a359faac69f8f9b22a3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0da2e073f9cbf4985a0fd9acb71bc5ff599f8afd",
        "lessThan": "b8e274e69ab09222c7a552c7c0c1eef9ce627fc1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "89ae9df09d2c1fb4a4eb495c113a7ce1dca34147",
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        "status": "affected",
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      },
      {
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      },
      {
        "version": "f580d27e8928828693df44ba2db0fffdbe11dfea",
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        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f580d27e8928828693df44ba2db0fffdbe11dfea",
        "lessThan": "10f293a07f9e10e988b0ae44e2e99c631f5a68e0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2b2eda2821cff1d1b5a423b6ee7d8fc6fbc8e694",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6.1.176",
        "lessThan": "6.1.178",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.6.143",
        "lessThan": "6.6.145",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.12.94",
        "lessThan": "6.12.96",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.18.36",
        "lessThan": "6.18.39",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "7.0.13",
        "lessThan": "7.1",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "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": "7.1",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "7.1",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.178",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.145",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.96",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.39",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.4",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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05 Aug 2026 12:42Current
CVSS 3.18.8
EPSS0.00435
33