{"id":11930,"date":"2026-09-04T18:53:58","date_gmt":"2026-09-04T10:53:58","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74750"},"modified":"2026-09-04T18:53:58","modified_gmt":"2026-09-04T10:53:58","slug":"cve-2026-74750","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74750","title":{"rendered":"CVE-2026-74750 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\novpn: defer key slot"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ovpn: defer key slot crypto freeing to workqueue<\/p>\n<p>Key slots are released through a kref and the existing release path<br \/>\nfrees the AEAD transforms from an RCU callback. That is not safe for all<br \/>\ncrypto implementations: crypto_free_aead can sleep, for example when an<br \/>\nasync or hardware implementation has teardown work to complete.<\/p>\n<p>Use queue_rcu_work for key-slot release. This keeps the RCU grace period<br \/>\nneeded by lockless key-slot readers, but runs the actual crypto teardown<br \/>\nfrom workqueue context where sleeping is allowed. Once the rcu_work<br \/>\ncallback runs, pre-existing RCU readers are gone, and the final kref put<br \/>\nalready proves that no transform user remains, so the worker can release<br \/>\nthe AEAD transforms and free the slot directly.<\/p>\n<p>The previous patch drains ovpn_wq during module exit, so queued key-slot<br \/>\nteardown work cannot outlive module text.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ovpn: defer key slot crypto freeing to workqueue<\/p>\n<p>Key slots are released through a kref and the existing release path<br \/>\nfrees the AEA<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-11930","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/11930","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=11930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11930"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}