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    <link>https://cve.radiocsirt.org</link>
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    <lastBuildDate>Thu, 08 Oct 2026 18:16:50 +0000</lastBuildDate>
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      <title>CVE-2023-52840 — Input: synaptics-rmi4 - fix use after free in rmi_unregister_function()</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2023-52840</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;Input: synaptics-rmi4 - fix use after free in rmi_unregister_function()&lt;/p&gt;
&lt;p&gt;The put_device() calls rmi_release_function() which frees &amp;#34;fn&amp;#34; so the
dereference on the next line &amp;#34;fn-&amp;gt;num_of_irqs&amp;#34; is a use after free.
Move the put_device() to the end to fix this.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;Input: synaptics-rmi4 - fix use after free in rmi_unregister_function()&lt;/p&gt;
&lt;p&gt;The put_device() calls rmi_release_function() which frees &amp;#34;fn&amp;#34; so the
dereference on the next line &amp;#34;fn-&amp;gt;num_of_irqs&amp;#34; is a use after free.
Move the put_device() to the end to fix this.&lt;/p&gt;</content:encoded>
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