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CVE-2026-64138 ksmbd: validate SID in parent security descriptor during ACL inheritance

🗓️ 19 Jul 2026 15:40:31Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 14 Views

CVE-2026-64138: ksmbd adds smb_validate_ntsd_sid() to validate Owner and Group SIDs in the parent NT Security Descriptor during ACL inheritance.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-64138
19 Jul 202615:40
attackerkb
CVE
CVE-2026-64138
19 Jul 202615:40
cve
EUVD
EUVD-2026-45823
19 Jul 202615:40
euvd
NVD
CVE-2026-64138
19 Jul 202616:17
nvd
OSV
CVE-2026-64138 ksmbd: validate SID in parent security descriptor during ACL inheritance
19 Jul 202615:40
osv
OSV
DEBIAN-CVE-2026-64138
19 Jul 202616:17
osv
Positive Technologies
PT-2026-61455
19 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/smbacl.c"
    ],
    "versions": [
      {
        "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
        "lessThan": "f0e5c9c663badc9982e6941322eef1cb17de0f11",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
        "lessThan": "18d8db24b0a5b7be4829238dd4022236df02d421",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
        "lessThan": "1c9d0646a9959752f11ca1080dc1ff26bd1756cb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
        "lessThan": "69f030cf95488ae1186c72ac8c66fd279664ea7f",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/server/smbacl.c"
    ],
    "versions": [
      {
        "version": "5.15",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.15",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.92",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.34",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.11",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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