{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f44158485826c076335d6860d35872271a83791d"
            },
            {
              "fixed": "591acf171644de590cda245fd8595b473a1beb70"
            },
            {
              "fixed": "0093909becbda22b62b39b654dbc607faed59cd0"
            },
            {
              "fixed": "e148e567a9252643baa125cb65d7ae9c2c6cf68a"
            }
          ],
          "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": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93786.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: preserve VFS inherited POSIX ACL mask\n\nThe VFS initializes a child's POSIX ACL from the parent's default ACL and\nthe requested creation mode. Do not mutate the parent ACL or overwrite the\nchild's VFS-computed access and default ACLs afterwards.\n\nThis preserves restrictive ACL_MASK entries and prevents SMB object creation\nfrom widening effective permissions.",
  "id": "CVE-2026-93786",
  "modified": "2026-09-27T03:30:23.690434821Z",
  "published": "2026-09-24T16:02:19.798Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0093909becbda22b62b39b654dbc607faed59cd0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/591acf171644de590cda245fd8595b473a1beb70"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e148e567a9252643baa125cb65d7ae9c2c6cf68a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93786.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93786"
    },
    {
      "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:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ksmbd: preserve VFS inherited POSIX ACL mask"
}