{"id":"AZL-75246","summary":"CVE-2023-53520 affecting package kernel 5.15.200.1-1","details":"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  \u003c4\u003e[102152.653246] Call Trace:\n  \u003c4\u003e[102152.653254]  hci_suspend_sync+0x109/0x301 [bluetooth]\n  \u003c4\u003e[102152.653259]  hci_suspend_dev+0x78/0xcd [bluetooth]\n  \u003c4\u003e[102152.653263]  hci_suspend_notifier+0x42/0x7a [bluetooth]\n  \u003c4\u003e[102152.653268]  notifier_call_chain+0x43/0x6b\n  \u003c4\u003e[102152.653271]  __blocking_notifier_call_chain+0x48/0x69\n  \u003c4\u003e[102152.653273]  __pm_notifier_call_chain+0x22/0x39\n  \u003c4\u003e[102152.653276]  pm_suspend+0x287/0x57c\n  \u003c4\u003e[102152.653278]  state_store+0xae/0xe5\n  \u003c4\u003e[102152.653281]  kernfs_fop_write+0x109/0x173\n  \u003c4\u003e[102152.653284]  __vfs_write+0x16f/0x1a2\n  \u003c4\u003e[102152.653287]  ? selinux_file_permission+0xca/0x16f\n  \u003c4\u003e[102152.653289]  ? security_file_permission+0x36/0x109\n  \u003c4\u003e[102152.653291]  vfs_write+0x114/0x21d\n  \u003c4\u003e[102152.653293]  __x64_sys_write+0x7b/0xdb\n  \u003c4\u003e[102152.653296]  do_syscall_64+0x59/0x194\n  \u003c4\u003e[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.","modified":"2026-04-01T05:22:50.124193Z","published":"2025-10-01T12:15:56Z","upstream":["CVE-2023-53520"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53520"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"5.15.200.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-75246.json"}}],"schema_version":"1.7.5"}