{"id":14858,"date":"2026-09-04T19:02:15","date_gmt":"2026-09-04T11:02:15","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-53389"},"modified":"2026-09-04T19:02:15","modified_gmt":"2026-09-04T11:02:15","slug":"cve-2026-53389","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-53389","title":{"rendered":"CVE-2026-53389 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nnet\/tcp-ao: fix use-a"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net\/tcp-ao: fix use-after-free of key in del_async path<\/p>\n<p>In tcp_ao_delete_key(), the del_async path skips the current_key<br \/>\nand rnext_key validity checks present in the synchronous path,<br \/>\nassuming these pointers are always NULL on LISTEN sockets.  However,<br \/>\nif a key was added with set_current=1\/set_rnext=1 while the socket<br \/>\nwas in CLOSE state, current_key and rnext_key will be non-NULL<br \/>\nafter listen() transitions the socket to LISTEN.<\/p>\n<p>When such a key is deleted with del_async=1, hlist_del_rcu() and<br \/>\ncall_rcu() free the key without clearing the dangling pointers.<br \/>\nAfter the RCU grace period, getsockopt(TCP_AO_INFO) dereferences<br \/>\ncurrent_key-&gt;sndid and rnext_key-&gt;rcvid from freed slab memory.<\/p>\n<p>Clear current_key and rnext_key in the del_async path when they<br \/>\nreference the key being deleted.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net\/tcp-ao: fix use-after-free of key in del_async path<\/p>\n<p>In tcp_ao_delete_key(), the del_async path skips the current_key<br \/>\nand rnext<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-14858","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/14858","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14858"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14858"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14858"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}