{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f5a544e3bab78142207e0242d22442db85ba1eff"
            },
            {
              "fixed": "e74c00c6af428a39e564cdc5bd3a3648c6d8de87"
            },
            {
              "fixed": "e3a93ce6e25757b8f375e38b8f91e1d9da4edc1a"
            },
            {
              "fixed": "1ff46c9915c1cbf454db58a8cb87f7cac818e6a6"
            },
            {
              "fixed": "974c1c224e85549dc3459f3bb2255bbbdd2b9372"
            },
            {
              "fixed": "2cc8a4db633b10715450b291c1343859a4b2c509"
            },
            {
              "fixed": "1e2bec062c5c9ec282636715166056d0998d746d"
            },
            {
              "fixed": "b0da97c034b6107d14e537e212d4ce8b22109a58"
            }
          ],
          "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": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.141"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.91"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52911.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: scope conn-\u003ebinding slowpath to bound sessions only\n\nWhen the binding SESSION_SETUP sets conn-\u003ebinding = true, the flag stays\nset after the call so that the global session lookup in\nksmbd_session_lookup_all() can find the session, which was not added to\nconn-\u003esessions. Because the flag is connection-wide, the global lookup\npath will also resolve any other session by id if asked.\n\nTighten the global lookup so that the returned session must have this\nconnection registered in its channel xarray (sess-\u003eksmbd_chann_list).\nThe channel entry is installed by the existing binding_session path in\nntlm_authenticate()/krb5_authenticate() when a SESSION_SETUP completes\nsuccessfully, so this condition is a strict equivalent of \"this\nconnection has been accepted as a channel of this session\". Connections\nthat have not bound to a given session cannot reach it via the global\ntable.\n\nThe existing conn-\u003ebinding gate for entering the slowpath is preserved\nso that non-binding connections keep the fast-path-only behavior, and\nthe session-\u003estate check is unchanged.",
  "id": "CVE-2026-52911",
  "modified": "2026-08-12T03:51:28.656573420Z",
  "published": "2026-06-21T06:18:49.342Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e2bec062c5c9ec282636715166056d0998d746d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ff46c9915c1cbf454db58a8cb87f7cac818e6a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2cc8a4db633b10715450b291c1343859a4b2c509"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/974c1c224e85549dc3459f3bb2255bbbdd2b9372"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0da97c034b6107d14e537e212d4ce8b22109a58"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3a93ce6e25757b8f375e38b8f91e1d9da4edc1a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e74c00c6af428a39e564cdc5bd3a3648c6d8de87"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52911.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52911"
    },
    {
      "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:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ksmbd: scope conn-\u003ebinding slowpath to bound sessions only"
}