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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Tue, 29 Sep 2026 05:34:18 +0000</lastBuildDate>
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      <title>CVE-2025-21786 — workqueue: Put the pwq after detaching the rescuer from the pool</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2025-21786</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;workqueue: Put the pwq after detaching the rescuer from the pool&lt;/p&gt;
&lt;p&gt;The commit 68f83057b913(&amp;#34;workqueue: Reap workers via kthread_stop() and
remove detach_completion&amp;#34;) adds code to reap the normal workers but
mistakenly does not handle the rescuer and also removes the code waiting
for the rescuer in put_unbound_pool(), which caused a use-after-free bug
reported by Cheung Wall.&lt;/p&gt;
&lt;p&gt;To avoid the use-after-free bug, the pool’s reference must be held until
the detachment is complete. Therefore, move the code that puts the pwq
after detaching the rescuer from the pool.&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;workqueue: Put the pwq after detaching the rescuer from the pool&lt;/p&gt;
&lt;p&gt;The commit 68f83057b913(&amp;#34;workqueue: Reap workers via kthread_stop() and
remove detach_completion&amp;#34;) adds code to reap the normal workers but
mistakenly does not handle the rescuer and also removes the code waiting
for the rescuer in put_unbound_pool(), which caused a use-after-free bug
reported by Cheung Wall.&lt;/p&gt;
&lt;p&gt;To avoid the use-after-free bug, the pool’s reference must be held until
the detachment is complete. Therefore, move the code that puts the pwq
after detaching the rescuer from the pool.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2025-21786</guid>
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