{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "eca0ae4aea66914515e5e3098ea051b518ee5316"
            },
            {
              "fixed": "6823f730bf195fc296d9edd09e2ca94bc1ff5584"
            },
            {
              "fixed": "1750a2df0eab61dc421a7afae74abdd239a44b85"
            },
            {
              "fixed": "dc34f8d8240f25dd137dc2758ebbcc75e3779142"
            },
            {
              "fixed": "f8eaf92c57ad99358dd372580d5ff87623343a72"
            },
            {
              "fixed": "0beddb0c380bed5f5b8e61ddbe14635bb73d0b41"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.6.140"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.90"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.32"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46111.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fix potential UAF in create_big_sync\n\nAdd hci_conn_valid() check in create_big_sync() to detect stale\nconnections before proceeding with BIG creation. Handle the\nresulting -ECANCELED in create_big_complete() and re-validate the\nconnection under hci_dev_lock() before dereferencing, matching the\npattern used by create_le_conn_complete() and create_pa_complete().\n\nKeep the hci_conn object alive across the async boundary by taking\na reference via hci_conn_get() when queueing create_big_sync(), and\ndropping it in the completion callback. The refcount and the lock\nare complementary: the refcount keeps the object allocated, while\nhci_dev_lock() serializes hci_conn_hash_del()'s list_del_rcu() on\nhdev-\u003econn_hash, as required by hci_conn_del().\n\nhci_conn_put() is called outside hci_dev_unlock() so the final put\n(which resolves to kfree() via bt_link_release) does not run under\nhdev-\u003elock, though the release path would be safe either way.\n\nWithout this, create_big_complete() would unconditionally\ndereference the conn pointer on error, causing a use-after-free\nvia hci_connect_cfm() and hci_conn_del().",
  "id": "CVE-2026-46111",
  "modified": "2026-07-08T05:37:30.813813696Z",
  "published": "2026-05-28T09:35:19.970Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0beddb0c380bed5f5b8e61ddbe14635bb73d0b41"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1750a2df0eab61dc421a7afae74abdd239a44b85"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6823f730bf195fc296d9edd09e2ca94bc1ff5584"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc34f8d8240f25dd137dc2758ebbcc75e3779142"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8eaf92c57ad99358dd372580d5ff87623343a72"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46111.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46111"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Bluetooth: hci_conn: fix potential UAF in create_big_sync"
}