{"id":5411,"date":"2026-09-04T18:47:49","date_gmt":"2026-09-04T10:47:49","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-68290"},"modified":"2026-09-04T18:47:49","modified_gmt":"2026-09-04T10:47:49","slug":"cve-2026-68290","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-68290","title":{"rendered":"CVE-2026-68290 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nrds: tcp: unregister"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>rds: tcp: unregister sysctl before tearing down listen socket<\/p>\n<p>rds_tcp_exit_net() frees the per-netns RDS TCP listen socket via<br \/>\nrds_tcp_kill_sock() before unregistering the per-netns sysctl table.  Since<br \/>\nrds_tcp_skbuf_handler() derives the netns from<br \/>\nrtn-&gt;rds_tcp_listen_sock-&gt;sk, a concurrent sysctl write can race with<br \/>\nnetns teardown and dereference the freed socket\/sk.<\/p>\n<p>KASAN reports the race as:<\/p>\n<p>  BUG: KASAN: slab-use-after-free in rds_tcp_skbuf_handler+0x2aa\/0x2e0<br \/>\n  rds_tcp_skbuf_handler              net\/rds\/tcp.c:721<br \/>\n  proc_sys_call_handler              fs\/proc\/proc_sysctl.c<br \/>\n  vfs_write                          fs\/read_write.c<br \/>\n  __x64_sys_pwrite64                 fs\/read_write.c<\/p>\n<p>Fix this by unregistering the RDS TCP sysctl table before calling<br \/>\nrds_tcp_kill_sock().  unregister_net_sysctl_table() prevents new sysctl<br \/>\nhandlers from starting and waits for in-flight handlers to finish, so<br \/>\nthe listen socket can then be released safely. The fix was tested<br \/>\nagainst the linked reproducer.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>rds: tcp: unregister sysctl before tearing down listen socket<\/p>\n<p>rds_tcp_exit_net() frees the per-netns RDS TCP listen socket via<br \/>\nrds<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5411","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5411","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=5411"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5411"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5411"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}