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    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Tue, 29 Sep 2026 23:47:51 +0000</lastBuildDate>
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      <title>CVE-2025-38717 — net: kcm: Fix race condition in kcm_unattach()</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2025-38717</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;net: kcm: Fix race condition in kcm_unattach()&lt;/p&gt;
&lt;p&gt;syzbot found a race condition when kcm_unattach(psock)
and kcm_release(kcm) are executed at the same time.&lt;/p&gt;
&lt;p&gt;kcm_unattach() is missing a check of the flag
kcm-&amp;gt;tx_stopped before calling queue_work().&lt;/p&gt;
&lt;p&gt;If the kcm has a reserved psock, kcm_unattach() might get executed
between cancel_work_sync() and unreserve_psock() in kcm_release(),
requeuing kcm-&amp;gt;tx_work right before kcm gets freed in kcm_done().&lt;/p&gt;
&lt;p&gt;Remove kcm-&amp;gt;tx_stopped and replace it by the less
error-prone disable_work_sync().&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;net: kcm: Fix race condition in kcm_unattach()&lt;/p&gt;
&lt;p&gt;syzbot found a race condition when kcm_unattach(psock)
and kcm_release(kcm) are executed at the same time.&lt;/p&gt;
&lt;p&gt;kcm_unattach() is missing a check of the flag
kcm-&amp;gt;tx_stopped before calling queue_work().&lt;/p&gt;
&lt;p&gt;If the kcm has a reserved psock, kcm_unattach() might get executed
between cancel_work_sync() and unreserve_psock() in kcm_release(),
requeuing kcm-&amp;gt;tx_work right before kcm gets freed in kcm_done().&lt;/p&gt;
&lt;p&gt;Remove kcm-&amp;gt;tx_stopped and replace it by the less
error-prone disable_work_sync().&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2025-38717</guid>
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