https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Fri, 02 Oct 2026 01:49:06 +0000 https://vulnerability.circl.lu/vuln/cve-2026-74534 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>Bluetooth: ISO: fix refcounting of iso_conn</p> <p>iso_conn_del() and iso_chan_del() have a race that results to double-put of iso_conn:</p> <p>[Task hdev-&gt;workqueue] [Task 2] iso_conn_del iso_chan_del iso_conn_hold_unless_zero iso_conn_lock iso_conn_lock conn-&gt;sk = NULL iso_conn_unlock sk = iso_sock_hold(conn) &lt;---------´ if (!sk) iso_conn_put iso_conn_put iso_conn_put /* UAF */</p> <p>The extra put for !sk in iso_conn_del() is currently required since failing iso_chan_add() may leave iso_conn not associated with any sk.</p> <p>Fix by having iso_pi(sk)-&gt;conn own refcount when non-NULL, so iso_conn_del does not need to put it. Adjust the iso_conn_add() refcounting so that conn is put if it does not get associated with an sk.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>Bluetooth: ISO: fix refcounting of iso_conn</p> <p>iso_conn_del() and iso_chan_del() have a race that results to double-put of iso_conn:</p> <p>[Task hdev-&gt;workqueue] [Task 2] iso_conn_del iso_chan_del iso_conn_hold_unless_zero iso_conn_lock iso_conn_lock conn-&gt;sk = NULL iso_conn_unlock sk = iso_sock_hold(conn) &lt;---------´ if (!sk) iso_conn_put iso_conn_put iso_conn_put /* UAF */</p> <p>The extra put for !sk in iso_conn_del() is currently required since failing iso_chan_add() may leave iso_conn not associated with any sk.</p> <p>Fix by having iso_pi(sk)-&gt;conn own refcount when non-NULL, so iso_conn_del does not need to put it. Adjust the iso_conn_add() refcounting so that conn is put if it does not get associated with an sk.</p> https://vulnerability.circl.lu/vuln/cve-2026-74534