{"id":"DEBIAN-CVE-2023-53520","details":"In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: Fix hci_suspend_sync crash  If hci_unregister_dev() frees the hci_dev object but hci_suspend_notifier may still be accessing it, it can cause the program to crash. Here's the call trace:   \u003c4\u003e[102152.653246] Call Trace:   \u003c4\u003e[102152.653254]  hci_suspend_sync+0x109/0x301 [bluetooth]   \u003c4\u003e[102152.653259]  hci_suspend_dev+0x78/0xcd [bluetooth]   \u003c4\u003e[102152.653263]  hci_suspend_notifier+0x42/0x7a [bluetooth]   \u003c4\u003e[102152.653268]  notifier_call_chain+0x43/0x6b   \u003c4\u003e[102152.653271]  __blocking_notifier_call_chain+0x48/0x69   \u003c4\u003e[102152.653273]  __pm_notifier_call_chain+0x22/0x39   \u003c4\u003e[102152.653276]  pm_suspend+0x287/0x57c   \u003c4\u003e[102152.653278]  state_store+0xae/0xe5   \u003c4\u003e[102152.653281]  kernfs_fop_write+0x109/0x173   \u003c4\u003e[102152.653284]  __vfs_write+0x16f/0x1a2   \u003c4\u003e[102152.653287]  ? selinux_file_permission+0xca/0x16f   \u003c4\u003e[102152.653289]  ? security_file_permission+0x36/0x109   \u003c4\u003e[102152.653291]  vfs_write+0x114/0x21d   \u003c4\u003e[102152.653293]  __x64_sys_write+0x7b/0xdb   \u003c4\u003e[102152.653296]  do_syscall_64+0x59/0x194   \u003c4\u003e[102152.653299]  entry_SYSCALL_64_after_hwframe+0x5c/0xc1  This patch holds the reference count of the hci_dev object while processing it in hci_suspend_notifier to avoid potential crash caused by the race condition.","modified":"2026-09-15T09:02:51.745104001Z","published":"2025-10-01T12:15:56.323Z","upstream":["CVE-2023-53520"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53520"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.55-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53520.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53520.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53520.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}