发布于3月6日3月6日 Members Debian: CVE-2023-52757: linux -- security update Severity 7 CVSS (AV:L/AC:L/Au:S/C:C/I:C/A:C) Published 05/21/2024 Created 07/31/2024 Added 07/30/2024 Modified 01/30/2025 Description 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 0CPU 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* Solution(s) debian-upgrade-linux References https://attackerkb.com/topics/cve-2023-52757 CVE - 2023-52757
