{"id":7460,"date":"2026-09-04T18:49:33","date_gmt":"2026-09-04T10:49:33","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74473"},"modified":"2026-09-04T18:49:33","modified_gmt":"2026-09-04T10:49:33","slug":"cve-2026-74473","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74473","title":{"rendered":"CVE-2026-74473 [CRITICAL] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: use pskb_netwo"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>vxlan: use pskb_network_may_pull() in route_shortcircuit()<\/p>\n<p>route_shortcircuit() currently calls pskb_may_pull(skb, sizeof(struct iphdr))<br \/>\n(or ipv6hdr), which checks if bytes are available starting from skb-&gt;data.<\/p>\n<p>However, in vxlan_xmit(), skb-&gt;data points to the MAC header, so<br \/>\nskb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, 20)<br \/>\nonly checks 20 bytes from skb-&gt;data (which is 14 bytes MAC header + 6 bytes of<br \/>\nIP header), leaving the rest of the IP header potentially un-pulled in non-linear<br \/>\nfrags. Subsequent dereferences of ip_hdr(skb)-&gt;daddr can read beyond the pulled<br \/>\nlinear buffer length.<\/p>\n<p>Fix this by using pskb_network_may_pull(), which adds skb_network_offset(skb) to<br \/>\nthe length check to ensure the full network header is present in the linear buffer.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>vxlan: use pskb_network_may_pull() in route_shortcircuit()<\/p>\n<p>route_shortcircuit() currently calls pskb_may_pull(skb, sizeof(struct i<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7460","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7460","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=7460"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7460"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7460"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}