{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9"
            },
            {
              "fixed": "5cbabf3a71575cd31bc7785d92d4ab42338a654b"
            },
            {
              "fixed": "b35afd5cf8fab236ef21117e42ee45691d4ffa7b"
            },
            {
              "fixed": "0ce682867fd506f61f40c76bde7e4205bde34e87"
            },
            {
              "fixed": "20ee516a62989a8d505ee432f9e59525ea23984e"
            },
            {
              "fixed": "8cc9ec711f5255167247a9ab6a7179b787426ed7"
            },
            {
              "fixed": "b383bcad3d2fe634b26efbce53e22bbb5753a520"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.15.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64393.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: run set info with opener credentials\n\nSMB2 SET_INFO handlers call path-based VFS helpers after checking the\naccess mask granted to the SMB handle. Those helpers perform their owner,\ninode permission and LSM checks using the current ksmbd worker credentials.\n\nRun the complete SET_INFO dispatch with the credentials captured when the\nhandle was opened. This also removes the separate security information\ncredential setup and keeps all SET_INFO classes under one credential scope.\n\nDirect override_creds() is used because it can nest with the request\ncredential overrides already used by rename and link helpers.",
  "id": "CVE-2026-64393",
  "modified": "2026-08-18T03:30:58.994890815Z",
  "published": "2026-07-25T08:50:39.239Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ce682867fd506f61f40c76bde7e4205bde34e87"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/20ee516a62989a8d505ee432f9e59525ea23984e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5cbabf3a71575cd31bc7785d92d4ab42338a654b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8cc9ec711f5255167247a9ab6a7179b787426ed7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b35afd5cf8fab236ef21117e42ee45691d4ffa7b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b383bcad3d2fe634b26efbce53e22bbb5753a520"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64393.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64393"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ksmbd: run set info with opener credentials"
}