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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 08:42:23 +0000</lastBuildDate>
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      <title>CVE-2025-40022 — crypto: af_alg - Fix incorrect boolean values in af_alg_ctx</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2025-40022</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux, Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;crypto: af_alg - Fix incorrect boolean values in af_alg_ctx&lt;/p&gt;
&lt;p&gt;Commit 1b34cbbf4f01 (&amp;#34;crypto: af_alg - Disallow concurrent writes in
af_alg_sendmsg&amp;#34;) changed some fields from bool to 1-bit bitfields of
type u32.&lt;/p&gt;
&lt;p&gt;However, some assignments to these fields, specifically &amp;#39;more&amp;#39; and
&amp;#39;merge&amp;#39;, assign values greater than 1.  These relied on C&amp;#39;s implicit
conversion to bool, such that zero becomes false and nonzero becomes
true.&lt;/p&gt;
&lt;p&gt;With a 1-bit bitfields of type u32 instead, mod 2 of the value is taken
instead, resulting in 0 being assigned in some cases when 1 was intended.&lt;/p&gt;
&lt;p&gt;Fix this by restoring the bool type.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux, Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;crypto: af_alg - Fix incorrect boolean values in af_alg_ctx&lt;/p&gt;
&lt;p&gt;Commit 1b34cbbf4f01 (&amp;#34;crypto: af_alg - Disallow concurrent writes in
af_alg_sendmsg&amp;#34;) changed some fields from bool to 1-bit bitfields of
type u32.&lt;/p&gt;
&lt;p&gt;However, some assignments to these fields, specifically &amp;#39;more&amp;#39; and
&amp;#39;merge&amp;#39;, assign values greater than 1.  These relied on C&amp;#39;s implicit
conversion to bool, such that zero becomes false and nonzero becomes
true.&lt;/p&gt;
&lt;p&gt;With a 1-bit bitfields of type u32 instead, mod 2 of the value is taken
instead, resulting in 0 being assigned in some cases when 1 was intended.&lt;/p&gt;
&lt;p&gt;Fix this by restoring the bool type.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2025-40022</guid>
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