CVE-2023-52757 (GCVE-0-2023-52757)
Vulnerability from cvelistv5
Published
2024-05-21 15:30
Modified
2026-05-23 15:26
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential deadlock when releasing mids All release_mid() callers seem to hold a reference of @mid so there is no need to call kref_put(&mid->refcount, __release_mid) under @server->mid_lock spinlock. If they don't, then an use-after-free bug would have occurred anyways. By getting rid of such spinlock also fixes a potential deadlock as shown below CPU 0 CPU 1 ------------------------------------------------------------------ cifs_demultiplex_thread() cifs_debug_data_proc_show() release_mid() spin_lock(&server->mid_lock); spin_lock(&cifs_tcp_ses_lock) spin_lock(&server->mid_lock) __release_mid() smb2_find_smb_tcon() spin_lock(&cifs_tcp_ses_lock) *deadlock*
References
Impacted products
Vendor Product Version
Linux Linux Version: 7b71843fa7028475b052107664cbe120156a2cfc
Version: 7b71843fa7028475b052107664cbe120156a2cfc
Version: 7b71843fa7028475b052107664cbe120156a2cfc
Version: 7b71843fa7028475b052107664cbe120156a2cfc
Version: 7b71843fa7028475b052107664cbe120156a2cfc
Version: 7b71843fa7028475b052107664cbe120156a2cfc
Version: 9871dea42034ee6e73bb2b97ba0284d3d462b230
Version: 5.4.6   ≤
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