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    <lastBuildDate>Mon, 05 Oct 2026 21:49:25 +0000</lastBuildDate>
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      <title>CVE-2022-48874 — misc: fastrpc: Fix use-after-free and race in fastrpc_map_find</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2022-48874</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;misc: fastrpc: Fix use-after-free and race in fastrpc_map_find&lt;/p&gt;
&lt;p&gt;Currently, there is a race window between the point when the mutex is
unlocked in fastrpc_map_lookup and the reference count increasing
(fastrpc_map_get) in fastrpc_map_find, which can also lead to
use-after-free.&lt;/p&gt;
&lt;p&gt;So lets merge fastrpc_map_find into fastrpc_map_lookup which allows us
to both protect the maps list by also taking the &amp;amp;fl-&amp;gt;lock spinlock and
the reference count, since the spinlock will be released only after.
Add take_ref argument to make this suitable for all callers.&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;misc: fastrpc: Fix use-after-free and race in fastrpc_map_find&lt;/p&gt;
&lt;p&gt;Currently, there is a race window between the point when the mutex is
unlocked in fastrpc_map_lookup and the reference count increasing
(fastrpc_map_get) in fastrpc_map_find, which can also lead to
use-after-free.&lt;/p&gt;
&lt;p&gt;So lets merge fastrpc_map_find into fastrpc_map_lookup which allows us
to both protect the maps list by also taking the &amp;amp;fl-&amp;gt;lock spinlock and
the reference count, since the spinlock will be released only after.
Add take_ref argument to make this suitable for all callers.&lt;/p&gt;</content:encoded>
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