{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "cad348a17e170451ea8688b532a6ca3e98c63b60"
            },
            {
              "fixed": "b2b915042be073637d9f93dc51ef15fc0685ae8a"
            },
            {
              "fixed": "a43452d8c1015ac2f0e43ff946be5425427b02cc"
            },
            {
              "fixed": "3f6394f6c6d1b6817065d3b402f55d437063a704"
            },
            {
              "fixed": "d5c372ad03330f02962d4860df4d355ab25487df"
            },
            {
              "fixed": "3fd5164bdb04635caa7942ddb554b0ec699a9433"
            },
            {
              "fixed": "a661f401f83b8462f2d424e0a1a72b7681e92ea2"
            },
            {
              "fixed": "d0aef0b0374678153244f162df507106d728af39"
            },
            {
              "fixed": "08e90633377f1b2567ab5ad6810b74c552246a07"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.12.0"
            },
            {
              "fixed": "5.10.273"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.224"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.191"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.160"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.57"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99008.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: RFCOMM: Fix NULL tty_dev dereference in rfcomm_dev_shutdown\n\nsyzbot hit a NULL pointer dereference in rfcomm_dev_shutdown() when an\nRFCOMM tty is closed.\n\nrfcomm_dev_add() puts the new device on rfcomm_dev_list first and only\nthen registers the tty device and saves it in dev-\u003etty_dev. If that\nregistration fails, dev-\u003etty_dev is never set at all. The device can be\nlooked up in the meantime, so an open() of /dev/rfcommN gets through\nrfcomm_tty_install() and attaches to it. When that tty is closed again,\nrfcomm_dev_shutdown() uses dev-\u003etty_dev without checking it:\n\n  Oops: general protection fault, probably for non-canonical address\n  KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]\n  RIP: 0010:rfcomm_dev_shutdown+0x48/0xb0 net/bluetooth/rfcomm/tty.c:131\n  Call Trace:\n   tty_port_shutdown+0x1bf/0x220 drivers/tty/tty_port.c:372\n   tty_port_close+0x4e/0x150 drivers/tty/tty_port.c:705\n   tty_release+0x359/0x1670 drivers/tty/tty_io.c:1718\n   __fput+0x418/0xa50 fs/file_table.c:512\n\nrfcomm_dev_destruct() already copes with a NULL dev-\u003etty_dev. Add the\nsame check to rfcomm_dev_shutdown(), so the tty device is only moved\nwhen it was actually registered.",
  "id": "CVE-2026-99008",
  "modified": "2026-11-01T02:30:54.766744187Z",
  "published": "2026-10-23T12:20:33.355Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08e90633377f1b2567ab5ad6810b74c552246a07"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f6394f6c6d1b6817065d3b402f55d437063a704"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3fd5164bdb04635caa7942ddb554b0ec699a9433"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a43452d8c1015ac2f0e43ff946be5425427b02cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a661f401f83b8462f2d424e0a1a72b7681e92ea2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2b915042be073637d9f93dc51ef15fc0685ae8a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0aef0b0374678153244f162df507106d728af39"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5c372ad03330f02962d4860df4d355ab25487df"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99008.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99008"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.2",
  "summary": "Bluetooth: RFCOMM: Fix NULL tty_dev dereference in rfcomm_dev_shutdown"
}