{"id":25798,"date":"2026-09-18T04:31:54","date_gmt":"2026-09-17T20:31:54","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90389"},"modified":"2026-09-18T04:31:54","modified_gmt":"2026-09-17T20:31:54","slug":"cve-2026-90389","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90389","title":{"rendered":"CVE-2026-90389 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nmd: scope memalloc_no"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>md: scope memalloc_noio to allocation critical sections<\/p>\n<p>Storing a memalloc_noio_save() token in mddev-&gt;noio_flags lets one task<br \/>\nsave the token and another task restore it. With concurrent suspend sysfs<br \/>\nwrites, task A can enter PF_MEMALLOC_NOIO, return to userspace still in<br \/>\nthat scope, and later task B can restore A&#8217;s saved token.<\/p>\n<p>Avoid tying the token lifetime to mddev. Keep mddev_suspend() and<br \/>\nmddev_resume() only responsible for array suspension, and enter<br \/>\nPF_MEMALLOC_NOIO only in the MD paths that allocate memory after the array<br \/>\nhas been suspended. Restore the token before resuming the array.<\/p>\n<p>A reproducer repeatedly writes suspend_lo and suspend_hi from concurrent<br \/>\nworkers and checks each worker&#8217;s \/proc\/self\/stat flags before and after the<br \/>\nsysfs write.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>md: scope memalloc_noio to allocation critical sections<\/p>\n<p>Storing a memalloc_noio_save() token in mddev-&gt;noio_flags lets one task<br \/>\nsa<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25798","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25798","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=25798"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25798"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25798"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}