{"id":8844,"date":"2026-09-04T18:50:06","date_gmt":"2026-09-04T10:50:06","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74550-2"},"modified":"2026-09-04T18:50:06","modified_gmt":"2026-09-04T10:50:06","slug":"cve-2026-74550-2","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74550-2","title":{"rendered":"CVE-2026-74550 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nnet: do not send ICMP"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net: do not send ICMP\/NDISC Redirects when peer allocation fails<\/p>\n<p>When inet_getpeer_v4() or inet_getpeer_v6() fails to allocate a peer entry<br \/>\nunder memory pressure or tree size caps, redirect handlers previously fell<br \/>\nback to sending un-rate-limited ICMP\/NDISC Redirect messages.<\/p>\n<p>In IPv4, ip_rt_send_redirect() called icmp_send() directly when peer == NULL.<br \/>\nIn IPv6, ip6_forward() and ndisc_send_redirect() passed a NULL peer into<br \/>\ninet_peer_xrlim_allow(), which returned true when peer == NULL.<\/p>\n<p>Because ICMP\/NDISC Redirects are not part of the default global rate limit<br \/>\nmask (sysctl_icmp_ratemask), sending redirects when peer == NULL creates<br \/>\nan un-rate-limited ICMP packet storm.<\/p>\n<p>Fix this by failing closed in ip_rt_send_redirect(), ip6_forward(), and<br \/>\nndisc_send_redirect() when peer is NULL.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net: do not send ICMP\/NDISC Redirects when peer allocation fails<\/p>\n<p>When inet_getpeer_v4() or inet_getpeer_v6() fails to allocate a p<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-8844","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/8844","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=8844"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8844"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}