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  <updated>2026-10-04T18:45:29.752899+00:00</updated>
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  <entry>
    <id>https://vulnerability.circl.lu/vuln/ubuntu-cve-2023-52757</id>
    <title>UBUNTU-CVE-2023-52757</title>
    <updated>2026-10-04T18:45:29.901969+00:00</updated>
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      <div xmlns="http://www.w3.org/1999/xhtml"><p><strong>Affected:</strong> Ubuntu:Pro:14.04:LTS: linux-azure, Ubuntu:Pro:16.04:LTS: linux-aws-hwe, Ubuntu:Pro:16.04:LTS: linux-azure, Ubuntu:Pro:16.04:LTS: linux-gcp, Ubuntu:Pro:16.04:LTS: linux-hwe, Ubuntu:Pro:16.04:LTS: linux-oracle, Ubuntu:16.04:LTS: linux-hwe-edge, Ubuntu:Pro:18.04:LTS: linux, Ubuntu:Pro:18.04:LTS: linux-aws, Ubuntu:18.04:LTS: linux-aws-5.0 and 153 more</p>
<p>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(&amp;mid-&gt;refcount, __release_mid) under @server-&gt;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(&amp;server-&gt;mid_lock);                                      spin_lock(&amp;cifs_tcp_ses_lock) 				      spin_lock(&amp;server-&gt;mid_lock)   __release_mid()    smb2_find_smb_tcon()     spin_lock(&amp;cifs_tcp_ses_lock) *deadlock*</p></div>
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    <link href="https://vulnerability.circl.lu/vuln/ubuntu-cve-2023-52757"/>
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