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CVE-2026-64396 ksmbd: fix UAF of struct file_lock in SMB2_LOCK deferred-lock cancellation

🗓️ 25 Jul 2026 08:50:40Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 8 Views

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix UAF of struct file_lock in SMB2_LOCK deferred-lock cancellation When a blocking byte-range lock request is deferred in theFILE_LOCK_DEFERRED path, ksmbd registers the a...

Related
Affected
Refs
ReporterTitlePublishedViews
Family
CVE
CVE-2026-64396
25 Jul 202608:50
cve
Debian CVE
CVE-2026-64396
25 Jul 202608:50
debiancve
EUVD
EUVD-2026-48940
25 Jul 202608:50
euvd
NVD
CVE-2026-64396
25 Jul 202610:17
nvd
OSV
DEBIAN-CVE-2026-64396
25 Jul 202616:48
osv
Positive Technologies
PT-2026-64617
25 Jul 202600:00
ptsecurity
[
  {
    "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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "367c42a611fe488b7b03f1f6737f4dee0e8b20a2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "5c75275c0fc9a2deb0d8f5604edcb16f288171c8",
        "status": "affected",
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      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "d20d1c8ba5765d1d12eefc0aee6385ab3f240e1e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0",
        "lessThan": "6.1.178",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "0",
        "lessThan": "6.6.145",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "0",
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      },
      {
        "version": "0",
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        "status": "affected",
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      }
    ]
  },
  {
    "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": "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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25 Jul 2026 08:50Current
EPSS0.00215
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