{"id":"CVE-2023-53520","revision":"ea7fcadb804b41069ad92048e1f2fda6","records":[{"revision":"ea7fcadb804b41069ad92048e1f2fda6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-53520","aliases":[],"title":"Bluetooth: Fix hci_suspend_sync crash","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: Fix hci_suspend_sync crash\n\nIf hci_unregister_dev() frees the hci_dev object but hci_suspend_notifier\nmay still be accessing it, it can cause the program to crash.\nHere's the call trace:\n  <4>[102152.653246] Call Trace:\n  <4>[102152.653254]  hci_suspend_sync+0x109/0x301 [bluetooth]\n  <4>[102152.653259]  hci_suspend_dev+0x78/0xcd [bluetooth]\n  <4>[102152.653263]  hci_suspend_notifier+0x42/0x7a [bluetooth]\n  <4>[102152.653268]  notifier_call_chain+0x43/0x6b\n  <4>[102152.653271]  __blocking_notifier_call_chain+0x48/0x69\n  <4>[102152.653273]  __pm_notifier_call_chain+0x22/0x39\n  <4>[102152.653276]  pm_suspend+0x287/0x57c\n  <4>[102152.653278]  state_store+0xae/0xe5\n  <4>[102152.653281]  kernfs_fop_write+0x109/0x173\n  <4>[102152.653284]  __vfs_write+0x16f/0x1a2\n  <4>[102152.653287]  ? selinux_file_permission+0xca/0x16f\n  <4>[102152.653289]  ? security_file_permission+0x36/0x109\n  <4>[102152.653291]  vfs_write+0x114/0x21d\n  <4>[102152.653293]  __x64_sys_write+0x7b/0xdb\n  <4>[102152.653296]  do_syscall_64+0x59/0x194\n  <4>[102152.653299]  entry_SYSCALL_64_after_hwframe+0x5c/0xc1\n\nThis patch holds the reference count of the hci_dev object while\nprocessing it in hci_suspend_notifier to avoid potential crash\ncaused by the race condition.","state":0,"publishedAt":"2025-10-01T11:46:07.355+00:00","modifiedAt":"2026-10-15T21:41:29.915+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/hci_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"9952d90ea2885d7cbf80cd233f694f09a9c0eaec\",\n                            \"lessThan\": \"e1fa25a91091bbed691ba2996a6cee809e3309a2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9952d90ea2885d7cbf80cd233f694f09a9c0eaec\",\n                            \"lessThan\": \"06e2b5ad72b60f90bfe565c201346532e271f484\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9952d90ea2885d7cbf80cd233f694f09a9c0eaec\",\n                            \"lessThan\": \"f9c8ce5d665653e3cf71a76349d41d7a7f7947e6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9952d90ea2885d7cbf80cd233f694f09a9c0eaec\",\n                            \"lessThan\": \"573ebae162111063eedc6c838a659ba628f66a0f\",\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/hci_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.199\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.55\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.5.5\",\n                            \"lessThanOrEqual\": \"6.5.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/e1fa25a91091bbed691ba2996a6cee809e3309a2","https://git.kernel.org/stable/c/06e2b5ad72b60f90bfe565c201346532e271f484","https://git.kernel.org/stable/c/f9c8ce5d665653e3cf71a76349d41d7a7f7947e6","https://git.kernel.org/stable/c/573ebae162111063eedc6c838a659ba628f66a0f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53520","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-53520","identifiers":["CVE-2023-53520"]},"retained":false,"historicalAffected":[]}],"coverage":[]}