{"id":21431,"date":"2026-09-12T04:31:10","date_gmt":"2026-09-11T20:31:10","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89509"},"modified":"2026-09-12T04:31:10","modified_gmt":"2026-09-11T20:31:10","slug":"cve-2026-89509","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89509","title":{"rendered":"CVE-2026-89509 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA\/ionic: Embed cou"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>RDMA\/ionic: Embed counter driver data in rdma_counter allocation<\/p>\n<p>Commit 7e53b31acc7f (&#8220;RDMA\/core: Create and destroy rdma_counter using<br \/>\nrdma_zalloc_drv_obj()&#8221;) requires drivers implementing counter ops to<br \/>\nembed struct rdma_counter in a driver-specific struct, register its size<br \/>\nvia INIT_RDMA_OBJ_SIZE, and provide a counter_init callback.<\/p>\n<p>The ionic driver was merged without this adaptation, causing a NULL<br \/>\npointer dereference in alloc_and_bind() since rdma_zalloc_drv_obj()<br \/>\nallocates zero bytes when size_rdma_counter is unset.<\/p>\n<p>Consolidate struct ionic_counter into a new struct ionic_rdma_counter<br \/>\nthat embeds struct rdma_counter, replace the xarray with a lightweight<br \/>\nida for ID allocation, and add the required counter_init and<br \/>\nINIT_RDMA_OBJ_SIZE declarations.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>RDMA\/ionic: Embed counter driver data in rdma_counter allocation<\/p>\n<p>Commit 7e53b31acc7f (&#8220;RDMA\/core: Create and destroy rdma_counter <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21431","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21431","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=21431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21431"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}