{"id":"CVE-2026-99008","revision":"1c107e306a724fce9fa0d3ddf689cf0a","records":[{"revision":"1c107e306a724fce9fa0d3ddf689cf0a","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-99008","aliases":[],"title":"Bluetooth: RFCOMM: Fix NULL tty_dev dereference in rfcomm_dev_shutdown","description":"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->tty_dev. If that\nregistration fails, dev->tty_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->tty_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->tty_dev. Add the\nsame check to rfcomm_dev_shutdown(), so the tty device is only moved\nwhen it was actually registered.","state":0,"publishedAt":"2026-10-23T12:20:33.355+00:00","modifiedAt":"2026-10-23T12:20:33.355+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bluetooth/rfcomm/tty.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"cad348a17e170451ea8688b532a6ca3e98c63b60\",\n                            \"lessThan\": \"d5c372ad03330f02962d4860df4d355ab25487df\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cad348a17e170451ea8688b532a6ca3e98c63b60\",\n                            \"lessThan\": \"3fd5164bdb04635caa7942ddb554b0ec699a9433\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cad348a17e170451ea8688b532a6ca3e98c63b60\",\n                            \"lessThan\": \"a661f401f83b8462f2d424e0a1a72b7681e92ea2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cad348a17e170451ea8688b532a6ca3e98c63b60\",\n                            \"lessThan\": \"d0aef0b0374678153244f162df507106d728af39\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cad348a17e170451ea8688b532a6ca3e98c63b60\",\n                            \"lessThan\": \"08e90633377f1b2567ab5ad6810b74c552246a07\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bluetooth/rfcomm/tty.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.12\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.113\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.11\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/d5c372ad03330f02962d4860df4d355ab25487df","https://git.kernel.org/stable/c/3fd5164bdb04635caa7942ddb554b0ec699a9433","https://git.kernel.org/stable/c/a661f401f83b8462f2d424e0a1a72b7681e92ea2","https://git.kernel.org/stable/c/d0aef0b0374678153244f162df507106d728af39","https://git.kernel.org/stable/c/08e90633377f1b2567ab5ad6810b74c552246a07"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99008","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99008","identifiers":["CVE-2026-99008"]},"retained":false,"historicalAffected":[]}],"coverage":[]}