{"id":21438,"date":"2026-09-12T04:31:11","date_gmt":"2026-09-11T20:31:11","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89516"},"modified":"2026-09-12T04:31:11","modified_gmt":"2026-09-11T20:31:11","slug":"cve-2026-89516","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89516","title":{"rendered":"CVE-2026-89516 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Don&#8217;t BUG_"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>sched_ext: Don&#8217;t BUG_ON a destroyed DSQ in process_deferred_reenq_users<\/p>\n<p>scx_bpf_dsq_reenq() queues a deferred reenq (dru) that runs from<br \/>\nrun_deferred(), not ops.dispatch(). If the DSQ is destroyed before the dru<br \/>\nruns, process_deferred_reenq_users() sees dsq-&gt;id == SCX_DSQ_INVALID and<br \/>\nhits the BUG_ON. destroy_dsq() doesn&#8217;t flush pending drus, so just skip.<\/p>\n<p>tj: Read dsq-&gt;id once with READ_ONCE(). Reading it separately in the INVALID<br \/>\n    check and the BUG_ON would leave a window where destroy_dsq() can<br \/>\n    invalidate the id between the two reads and still trigger the BUG_ON.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>sched_ext: Don&#8217;t BUG_ON a destroyed DSQ in process_deferred_reenq_users<\/p>\n<p>scx_bpf_dsq_reenq() queues a deferred reenq (dru) that run<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21438","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21438","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=21438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}