{"id":7049,"date":"2026-09-04T18:49:24","date_gmt":"2026-09-04T10:49:24","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-72405"},"modified":"2026-09-04T18:49:24","modified_gmt":"2026-09-04T10:49:24","slug":"cve-2026-72405","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-72405","title":{"rendered":"CVE-2026-72405 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nnet: udp_tunnel: prev"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net: udp_tunnel: prevent double queueing in udp_tunnel_nic_device_sync<\/p>\n<p>Yue Sun reported a use-after-free and debugobjects warning in<br \/>\nudp_tunnel_nic_device_sync_work() during concurrent device operations.<\/p>\n<p>The workqueue core clears the internal pending bit before invoking the<br \/>\nworker. At that point, a concurrent thread can queue the work again.<br \/>\nWhen the already running worker eventually clears the work_pending flag<br \/>\nto 0, it mistakenly clears the flag for the newly queued instance.<br \/>\nudp_tunnel_nic_unregister() then observes work_pending as 0 and frees<br \/>\nthe structure while the second work item is still active in the queue,<br \/>\nleading to UAF.<\/p>\n<p>Fix this by returning early in udp_tunnel_nic_device_sync() if<br \/>\nwork_pending is already set, preventing redundant work queueing.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net: udp_tunnel: prevent double queueing in udp_tunnel_nic_device_sync<\/p>\n<p>Yue Sun reported a use-after-free and debugobjects warning <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7049","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7049","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=7049"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7049"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7049"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}