https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 01 Oct 2026 20:00:40 +0000 https://vulnerability.circl.lu/vuln/cve-2026-68155 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>libceph: Reject monmaps advertising zero monitors</p> <p>A message of type CEPH_MSG_MON_MAP contains a monmap that is sent from a monitor to the client. This monmap contains information about the existing monitors in the cluster. Currently, a monmap indicating that there are zero monitors in the cluster is treated as valid. However, it is impossible to have zero monitors in the cluster and still receive a valid monmap from a monitor. Therefore, such a monmap must be corrupted and should be treated as invalid. Furthermore, a monmap with a monitor count of zero can subsequently crash the client when attempting to open a session with a monitor in __open_session(). This happens because the &#34;BUG_ON(monc-&gt;monmap-&gt;num_mon &lt; 1)&#34; assertion in pick_new_mon() is triggered.</p> <p>This patch extends a check in ceph_monmap_decode() to also reject arriving mon_maps with num_mon == 0 rather than only with num_mon &gt; CEPH_MAX_MON.</p> <p>[ idryomov: drop &#34;log output for unusual values of num_mon&#34; part ]</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>libceph: Reject monmaps advertising zero monitors</p> <p>A message of type CEPH_MSG_MON_MAP contains a monmap that is sent from a monitor to the client. This monmap contains information about the existing monitors in the cluster. Currently, a monmap indicating that there are zero monitors in the cluster is treated as valid. However, it is impossible to have zero monitors in the cluster and still receive a valid monmap from a monitor. Therefore, such a monmap must be corrupted and should be treated as invalid. Furthermore, a monmap with a monitor count of zero can subsequently crash the client when attempting to open a session with a monitor in __open_session(). This happens because the &#34;BUG_ON(monc-&gt;monmap-&gt;num_mon &lt; 1)&#34; assertion in pick_new_mon() is triggered.</p> <p>This patch extends a check in ceph_monmap_decode() to also reject arriving mon_maps with num_mon == 0 rather than only with num_mon &gt; CEPH_MAX_MON.</p> <p>[ idryomov: drop &#34;log output for unusual values of num_mon&#34; part ]</p> https://vulnerability.circl.lu/vuln/cve-2026-68155