{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0ece498c27d8cd2fdad6f49a6abc34b8badd8fbc"
            },
            {
              "fixed": "65ce6fe1b92112ba9064ded932c03180da3dd230"
            },
            {
              "fixed": "57059ff14d81df4a970b2ea8d8f54431bb91a025"
            },
            {
              "fixed": "b82802b5ab26a7c69fc2e7a0f2baa3c13a6c21aa"
            },
            {
              "fixed": "2bf282f8f715f5d05d6f4c49ffb3bd241c5e667e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.11.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68394.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: revalidate LOAD_CONN_PARAM queued update\n\nMGMT_OP_LOAD_CONN_PARAM queues conn_update_sync() when a single parameter\nupdate changes an existing LE central connection. The queued work currently\nstores a borrowed hci_conn_params entry from hdev-\u003ele_conn_params. A later\nLOAD_CONN_PARAM request can clear disabled parameters and free that entry\nbefore hci_cmd_sync_work() runs the queued callback.\n\nDo not keep the borrowed hci_conn_params pointer in queued work. Queue the\nhci_conn instead and hold a reference until the queued callback completes.\nWhen the work runs, revalidate that the connection is still present, look\nup the current hci_conn_params entry, and cancel the update if userspace\nremoved that entry while the work was pending.\n\nCopy the interval values from the current params entry under hdev-\u003elock,\nthen drop the lock and keep using hci_le_conn_update_sync() to issue the\nupdate.\n\nValidation reproduced this kernel report:\nBUG: KASAN: slab-use-after-free in conn_update_sync+0x2a/0xf0 [bluetooth]\nRead of size 1 at addr ffff88810c697126 by task kworker/u17:0/377\nWorkqueue: hci0 hci_cmd_sync_work [bluetooth]\n\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x66/0xa0\n print_report+0xce/0x5f0\n kasan_report+0xe0/0x110\n conn_update_sync+0x2a/0xf0 [bluetooth]\n hci_cmd_sync_work+0x187/0x210 [bluetooth]\n process_one_work+0x4fd/0xbc0\n worker_thread+0x2d8/0x570\n kthread+0x1ad/0x1f0\n ret_from_fork+0x3c9/0x540\n ret_from_fork_asm+0x1a/0x30\n\nAllocated by task 466:\n hci_conn_params_add+0xa6/0x240 [bluetooth]\n load_conn_param+0x4e1/0x850 [bluetooth]\n hci_sock_sendmsg+0x96b/0xf80 [bluetooth]\n\nFreed by task 474:\n kfree+0x313/0x590\n hci_conn_params_clear_disabled+0x9b/0xc0 [bluetooth]\n load_conn_param+0x4bf/0x850 [bluetooth]\n hci_sock_sendmsg+0x96b/0xf80 [bluetooth]",
  "id": "CVE-2026-68394",
  "modified": "2026-08-18T03:30:55.349020605Z",
  "published": "2026-08-10T12:04:13.562Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2bf282f8f715f5d05d6f4c49ffb3bd241c5e667e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57059ff14d81df4a970b2ea8d8f54431bb91a025"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/65ce6fe1b92112ba9064ded932c03180da3dd230"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b82802b5ab26a7c69fc2e7a0f2baa3c13a6c21aa"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68394.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68394"
    },
    {
      "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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Bluetooth: MGMT: revalidate LOAD_CONN_PARAM queued update"
}