CVE-2023-53520
CVE-2023-53520 updated by NVD
Summary
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: [102152.653246] Call Trace: [102152.653254] hci_suspend_sync+0x109/0x301 [bluetooth] [102152.653259] hci_suspend_dev+0x78/0xcd [bluetooth] [102152.653263] hci_suspend_notifier+0x42/0x7a [bluetooth] [102152.653268] notifier_call_chain+0x43/0x6b [102152.653271] __blocking_notifier_call_chain+0x48/0x69 [102152.653273] __pm_notifier_call_chain+0x22/0x39 [102152.653276] pm_suspend+0x287/0x57c [102152.653278] state_store+0xae/0xe5 [102152.653281] kernfs_fop_write+0x109/0x173 [102152.653284] __vfs_write+0x16f/0x1a2 [102152.653287] ? selinux_file_permission+0xca/0x16f [102152.653289] ? security_file_permission+0x36/0x109 [102152.653291] vfs_write+0x114/0x21d [102152.653293] __x64_sys_write+0x7b/0xdb [102152.653296] do_syscall_64+0x59/0x194 [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.
References
Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.
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