{"id":41321,"date":"2026-10-19T00:33:12","date_gmt":"2026-10-18T16:33:12","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98849"},"modified":"2026-10-19T00:33:12","modified_gmt":"2026-10-18T16:33:12","slug":"cve-2026-98849","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98849","title":{"rendered":"CVE-2026-98849 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\npfcp: fix socket life"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>pfcp: fix socket lifetime on netdevice registration failure<\/p>\n<p>pfcp_newlink() creates the UDP socket before register_netdevice().<br \/>\nIf registration fails after pfcp_dev_init() succeeds, the core calls<br \/>\npfcp_dev_uninit(), which releases the socket and clears pfcp-&gt;sk.<br \/>\nThe newlink error path then releases it again, causing a NULL pointer<br \/>\ndereference. This was observed with failslab fault injection:<\/p>\n<p>  FAULT_INJECTION: forcing a failure.<br \/>\n  kobject: kobject_add_internal failed for pfcp0 (error: -12 parent: net)<br \/>\n  BUG: KASAN: null-ptr-deref in udp_tunnel_sock_release+0x1c\/0x50<br \/>\n  Read of size 8 at addr 0000000000000120 by task ip\/1037<br \/>\n  Call trace:<br \/>\n   show_stack+0x18\/0x24 (C)<br \/>\n   dump_stack_lvl+0x78\/0x90<br \/>\n   print_report+0x468\/0x5cc<br \/>\n   kasan_report+0xa4\/0xf0<br \/>\n   __asan_load8+0x7c\/0xd0<br \/>\n   udp_tunnel_sock_release+0x1c\/0x50<br \/>\n   pfcp_newlink+0x128\/0x184<br \/>\n   rtnl_newlink+0x848\/0xe44<br \/>\n   rtnetlink_rcv_msg+0x468\/0x514<br \/>\n   netlink_rcv_skb+0xc0\/0x1f0<br \/>\n   rtnetlink_rcv+0x18\/0x24<br \/>\n   netlink_unicast+0x4b8\/0x558<br \/>\n   netlink_sendmsg+0x2b8\/0x584<br \/>\n   &#8230;<\/p>\n<p>Return from pfcp_del_sock() if pfcp-&gt;sk is NULL.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>pfcp: fix socket lifetime on netdevice registration failure<\/p>\n<p>pfcp_newlink() creates the UDP socket before register_netdevice().<br \/>\nIf <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41321","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41321","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=41321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41321"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}