{"id":41094,"date":"2026-10-19T00:32:07","date_gmt":"2026-10-18T16:32:07","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98622"},"modified":"2026-10-19T00:32:07","modified_gmt":"2026-10-18T16:32:07","slug":"cve-2026-98622","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98622","title":{"rendered":"CVE-2026-98622 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nnet\/sched: act_ct: do"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net\/sched: act_ct: don&#8217;t WARN on benign flow_offload_alloc() failure<\/p>\n<p>flow_offload_alloc() returns NULL when the conntrack entry is dying<br \/>\n(e.g. raced with a conntrack flush) or when the GFP_ATOMIC allocation<br \/>\nfails; both are expected under load and neither is a kernel bug. This<br \/>\npath runs from softirq on every committed packet, so with<br \/>\npanic_on_warn=1 an unprivileged user can panic the box just by racing<br \/>\na conntrack flush against a `tc &#8230; action ct commit` classifier.<\/p>\n<p>Reproduced with a custom repro under QEMU: a small, fixed set of UDP<br \/>\nflows through `tc filter &#8230; action ct commit` on lo, raced against<br \/>\nthreads flooding bare ctnetlink CT_DELETE (flush) requests. Hits<br \/>\nWARNING: net\/sched\/act_ct.c:437 (tcf_ct_flow_table_add(), inlined<br \/>\ninto tcf_ct_act() in this build) within ~15s on the unpatched kernel;<br \/>\nsame setup is clean on the patched kernel. The fix itself is<br \/>\nbehavior-preserving: both branches already did `goto err_alloc`<br \/>\nbefore and after, only the WARN is removed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net\/sched: act_ct: don&#8217;t WARN on benign flow_offload_alloc() failure<\/p>\n<p>flow_offload_alloc() returns NULL when the conntrack entry is<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41094","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41094","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=41094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}