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    <title>Most recent entries from all</title>
    <link>https://db.gcve.eu</link>
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    <lastBuildDate>Thu, 05 Nov 2026 22:47:51 +0000</lastBuildDate>
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      <title>CVE-2026-99270 — tcp: Fix potential UAF in reqsk_timer_handler().</title>
      <link>https://db.gcve.eu/vuln/cve-2026-99270</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;tcp: Fix potential UAF in reqsk_timer_handler().&lt;/p&gt;
&lt;p&gt;When TCP socket migration fails at inet_ehash_insert() in
reqsk_timer_handler(), we jump to the no_ownership: label
and free the new reqsk immediately with __reqsk_free().&lt;/p&gt;
&lt;p&gt;Thus, we must stop the new reqsk&amp;#39;s timer before jumping to the
label, but the timer might be missed since the cited commit,
resulting in UAF.&lt;/p&gt;
&lt;p&gt;As we are in the original reqsk&amp;#39;s timer context, we can safely
call timer_delete_sync() for the new reqsk.&lt;/p&gt;
&lt;p&gt;Let&amp;#39;s pass false to __inet_csk_reqsk_queue_drop() to stop
the new reqsk&amp;#39;s timer.&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;tcp: Fix potential UAF in reqsk_timer_handler().&lt;/p&gt;
&lt;p&gt;When TCP socket migration fails at inet_ehash_insert() in
reqsk_timer_handler(), we jump to the no_ownership: label
and free the new reqsk immediately with __reqsk_free().&lt;/p&gt;
&lt;p&gt;Thus, we must stop the new reqsk&amp;#39;s timer before jumping to the
label, but the timer might be missed since the cited commit,
resulting in UAF.&lt;/p&gt;
&lt;p&gt;As we are in the original reqsk&amp;#39;s timer context, we can safely
call timer_delete_sync() for the new reqsk.&lt;/p&gt;
&lt;p&gt;Let&amp;#39;s pass false to __inet_csk_reqsk_queue_drop() to stop
the new reqsk&amp;#39;s timer.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://db.gcve.eu/vuln/cve-2026-99270</guid>
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