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<a href="https://www.hpc.cineca.it/wp-admin/admin-ajax.php?action=tnptr&nltr=NjY3Ozk7aHR0cHM6Ly93d3cuaHBjLmNpbmVjYS5pdC9uZXdzbGV0dGVyL3Byb2ZpbGluZy1hbmQtZGVidWdnaW5nLWxpbWl0YXRpb25zLXVuZGVyLXB0cmFjZV9zY29wZTIvOzs2YTM2YTNmNzM1OWM2ODBiNDU4NjFiMzBiNmU4NDM3ZA%3D%3D" style="font-size: 32px; font-family: Verdana, Geneva, sans-serif; font-weight: normal; color: rgb(34, 34, 34); line-height: normal; margin: 0px; text-decoration: none; display: none;" class="tnpc-inline-editable" data-type="title" data-id="26000" dir="ltr" role="heading" aria-level="2">Profiling/Debugging Limitations Following Security Update (CVE-2026-46333)</a><td><form class="tnpc-inline-editable-form tnpc-inline-editable-form-title26000"><input type="hidden" name="id" value="26000"><input type="hidden" name="type" value="title"><input type="hidden" name="old_value" value="Profiling/Debugging Limitations Following Security Update (CVE-2026-46333)"><div class="tnpc-inline-editable-container"><textarea name="new_name" class="tnpc-inline-editable-textarea" rows="2" style="font-family:Verdana, Geneva, sans-serif;font-size:32px;">Profiling/Debugging Limitations Following Security Update (CVE-2026-46333)</textarea><div class="tnpc-inline-editable-form-actions"><button type="submit"><span class="dashicons dashicons-yes-alt" title="save"></span></button><span class="dashicons dashicons-dismiss tnpc-dismiss-title26000" title="close"></span></div></div></form></td> </td>
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18 June 2026 </td>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">Dear Users,</p>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">we regret to inform you that, following the security vulnerability <a href="https://www.hpc.cineca.it/wp-admin/admin-ajax.php?action=tnptr&nltr=NjY3Ozk7aHR0cHM6Ly93d3cuY3ZlLm9yZy9DVkVSZWNvcmQ%2FaWQ9Q1ZFLTIwMjYtNDYzMzM7O2VlMjVjNDkyNjAyZTViZmM4YTY1ODE0OGVmOGY3ZDJh" target="_blank" rel="noreferrer noopener">CVE-2026-46333</a> (released on May 15, 2026), which allows root privilege escalation by exploiting a flaw in the ptrace mechanism, a mitigation has been applied by tightening ptrace permissions. </p>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">In particular, the kernel parameter <code>ptrace_scope</code> has been increased from 0 (no restrictions) to 2 (only processes with administrative privileges can use ptrace).</p>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">This change, while necessary for security reasons, significantly restricts the use of <code>ptrace</code>. As a consequence, tools that rely on it, primarily profilers and debuggers, may fail to operate correctly.</p>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">To keep you informed, we have introduced a “Known Issues” section for the <a href="https://www.hpc.cineca.it/wp-admin/admin-ajax.php?action=tnptr&nltr=NjY3Ozk7aHR0cHM6Ly9kb2NzLmhwYy5jaW5lY2EuaXQvaHBjL2xlb25hcmRvLmh0bWwja25vd24taXNzdWVzOzswYmJkNmQ4NGFkMzVjZDUwZjJiZGUyNjVlMjY2N2I3ZQ%3D%3D">LEONARDO</a> and <a href="https://www.hpc.cineca.it/wp-admin/admin-ajax.php?action=tnptr&nltr=NjY3Ozk7aHR0cHM6Ly9kb2NzLmhwYy5jaW5lY2EuaXQvaHBjL2dhbGlsZW8uaHRtbCNrbm93bi1pc3N1ZXM7OzVlMzllMjg4MWYwNGI3NTM0NDIyMzk1MmQxNWZjMjhi">G100</a> cluster-specific documentation (similar to the one already available for <a href="https://www.hpc.cineca.it/wp-admin/admin-ajax.php?action=tnptr&nltr=NjY3Ozk7aHR0cHM6Ly9kb2NzLmhwYy5jaW5lY2EuaXQvaHBjL3BpdGFnb3JhLmh0bWwja25vd24taXNzdWVzOztjYjk2YmNjNjdmOGIzOTFlMjY4MWIzNTJmZTQ2NjllYw%3D%3D">PITAGORA</a>). These sections describe the issue, along with available workarounds and status updates.</p>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">If you have identified additional workarounds related to this topic, or if you believe there are other open issues that could benefit many users, please do not hesitate to contact our User Support Team at superc@cineca.it.</p>
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<p style="font-size: 16px;font-family: Verdana, Geneva, sans-serif;font-weight: normal;color: #222222; line-height: 1.5 !important;">Best regards,<br>HPC User Support @ CINECA</p>
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<p style="text-align: center"><span style="font-family: verdana, geneva, sans-serif"><span style="font-size: 12px">To unsubscribe to HPC-News send a mail to <a href="mailto:hpc-news-userdb-leave@list.cineca.it" target="_blank" rel="noopener">hpc-news-userdb-leave@list.cineca.it</a>.<br></span><span style="font-size: 12px">For more information see documentation at <a href="https://www.hpc.cineca.it/wp-admin/admin-ajax.php?action=tnptr&nltr=NjY3Ozk7aHR0cHM6Ly93d3cuaHBjLmNpbmVjYS5pdC91c2VyLXN1cHBvcnQvZ2V0LWluLXRvdWNoLzs7NDdkMjAwOTVhMjkwMDY4NjJkNDE5YTc1MDkzMzIzOWU%3D" target="_blank" rel="noopener">https://www.hpc.cineca.it/user-support/get-in-touch/</a></span></span></p> </td>
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