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    <title>Most recent entries from all</title>
    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Fri, 02 Oct 2026 16:36:12 +0000</lastBuildDate>
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      <title>CVE-2025-21836 — io_uring/kbuf: reallocate buf lists on upgrade</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2025-21836</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;io_uring/kbuf: reallocate buf lists on upgrade&lt;/p&gt;
&lt;p&gt;IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it
was created for legacy selected buffer and has been emptied. It violates
the requirement that most of the field should stay stable after publish.
Always reallocate it instead.&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;io_uring/kbuf: reallocate buf lists on upgrade&lt;/p&gt;
&lt;p&gt;IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it
was created for legacy selected buffer and has been emptied. It violates
the requirement that most of the field should stay stable after publish.
Always reallocate it instead.&lt;/p&gt;</content:encoded>
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