{"id":11206,"date":"2026-09-04T18:51:45","date_gmt":"2026-09-04T10:51:45","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74597"},"modified":"2026-09-04T18:51:45","modified_gmt":"2026-09-04T10:51:45","slug":"cve-2026-74597","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74597","title":{"rendered":"CVE-2026-74597 [CRITICAL] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nip6_tunnel: clear skb"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ip6_tunnel: clear skb2-&gt;cb[] in ip6ip6_err()<\/p>\n<p>ip6ip6_err() clones an outer IPv6 ICMP error skb, pulls it to the<br \/>\nquoted inner IPv6 packet, and then passes the clone to icmpv6_send().<br \/>\nThe clone still carries the outer packet&#8217;s inet6_skb_parm in skb-&gt;cb.<\/p>\n<p>If the outer packet had a Home Address Option, IP6CB(skb2)-&gt;dsthao<br \/>\nremains non-zero after skb_pull(). icmpv6_send() later calls<br \/>\nmip6_addr_swap(), which uses that stale dsthao offset against the quoted<br \/>\ninner packet. A malformed inner destination-options header can then make<br \/>\nthe HAO lookup and address swap run past the end of the quoted packet<br \/>\nand corrupt skb_shared_info.<\/p>\n<p>Clear skb2-&gt;cb[] before pulling the quoted inner IPv6 packet so the<br \/>\nreply path does not reuse metadata left by the outer IPv6 stack.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ip6_tunnel: clear skb2-&gt;cb[] in ip6ip6_err()<\/p>\n<p>ip6ip6_err() clones an outer IPv6 ICMP error skb, pulls it to the<br \/>\nquoted inner IPv6 p<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-11206","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/11206","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=11206"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11206"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}