{"id":29096,"date":"2026-09-25T20:31:52","date_gmt":"2026-09-25T12:31:52","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-97940"},"modified":"2026-09-25T20:31:52","modified_gmt":"2026-09-25T12:31:52","slug":"cve-2026-97940","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-97940","title":{"rendered":"CVE-2026-97940 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix fib6 walker"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ipv6: fix fib6 walker UAF on seq stop<\/p>\n<p>ipv6_route_iter_active() treats a walker in FWS_U at the table root as<br \/>\nalready unlinked. fib6_del_route() can move a still-linked walker into<br \/>\nthat same state when the current leaf is the last route at the root,<br \/>\nso ipv6_route_native_seq_stop() skips fib6_walker_unlink(). The seq<br \/>\nprivate object can then be freed while it remains on<br \/>\nnet-&gt;ipv6.fib6_walkers. A later route deletion walks the dangling list<br \/>\nand uses the freed walker.<\/p>\n<p>Use the list head as membership state and reinitialize it when<br \/>\nunlinking. Keep the existing w-&gt;node check so a never-started iterator<br \/>\nwith a zeroed private object is not treated as linked.<\/p>\n<p>The same stop helper is used by \/proc\/net\/ipv6_route and by the BPF<br \/>\nipv6_route iterator. The BPF show path only widens the race.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ipv6: fix fib6 walker UAF on seq stop<\/p>\n<p>ipv6_route_iter_active() treats a walker in FWS_U at the table root as<br \/>\nalready unlinked. fib<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29096","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29096","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=29096"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29096"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29096"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}