{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e"
            },
            {
              "fixed": "6cfeef221ac00d63c07f6122f58e6159bde69ca0"
            },
            {
              "fixed": "8b12f65d7caf16d124098cb4895a203367d35b57"
            },
            {
              "fixed": "455488cd5054bcc59db40fa1cc2c004031a5b2a5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.2.0"
            },
            {
              "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-2026-93785.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: validate idmap key payload length\n\nThe cifs.idmap key type stores its payload length in key-\u003edatalen, which\nis limited to U16_MAX.  Accepting a larger key payload truncates the\nrecorded length and can make later users interpret the payload using\ninconsistent bounds.\n\nReject oversized preparsed payloads before allocating or copying them.\nThis keeps key-\u003edatalen consistent with the stored data for both inline\nand separately allocated idmap payloads.",
  "id": "CVE-2026-93785",
  "modified": "2026-09-27T03:30:23.374753636Z",
  "published": "2026-09-24T16:02:18.964Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/455488cd5054bcc59db40fa1cc2c004031a5b2a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6cfeef221ac00d63c07f6122f58e6159bde69ca0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b12f65d7caf16d124098cb4895a203367d35b57"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93785.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93785"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "cifs: validate idmap key payload length"
}