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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 23:33:08 +0000</lastBuildDate>
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      <title>CVE-2026-23357 — can: mcp251x: fix deadlock in error path of mcp251x_open</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-23357</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;can: mcp251x: fix deadlock in error path of mcp251x_open&lt;/p&gt;
&lt;p&gt;The mcp251x_open() function call free_irq() in its error path with the
mpc_lock mutex held. But if an interrupt already occurred the
interrupt handler will be waiting for the mpc_lock and free_irq() will
deadlock waiting for the handler to finish.&lt;/p&gt;
&lt;p&gt;This issue is similar to the one fixed in commit 7dd9c26bd6cf (&amp;#34;can:
mcp251x: fix deadlock if an interrupt occurs during mcp251x_open&amp;#34;) but
for the error path.&lt;/p&gt;
&lt;p&gt;To solve this issue move the call to free_irq() after the lock is
released. Setting `priv-&amp;gt;force_quit = 1` beforehand ensure that the IRQ
handler will exit right away once it acquired the lock.&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;can: mcp251x: fix deadlock in error path of mcp251x_open&lt;/p&gt;
&lt;p&gt;The mcp251x_open() function call free_irq() in its error path with the
mpc_lock mutex held. But if an interrupt already occurred the
interrupt handler will be waiting for the mpc_lock and free_irq() will
deadlock waiting for the handler to finish.&lt;/p&gt;
&lt;p&gt;This issue is similar to the one fixed in commit 7dd9c26bd6cf (&amp;#34;can:
mcp251x: fix deadlock if an interrupt occurs during mcp251x_open&amp;#34;) but
for the error path.&lt;/p&gt;
&lt;p&gt;To solve this issue move the call to free_irq() after the lock is
released. Setting `priv-&amp;gt;force_quit = 1` beforehand ensure that the IRQ
handler will exit right away once it acquired the lock.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-23357</guid>
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