{"id":21379,"date":"2026-09-12T04:31:06","date_gmt":"2026-09-11T20:31:06","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89457"},"modified":"2026-09-12T04:31:06","modified_gmt":"2026-09-11T20:31:06","slug":"cve-2026-89457","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89457","title":{"rendered":"CVE-2026-89457 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ns390\/dasd: Guard sysf"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>s390\/dasd: Guard sysfs discipline callbacks against unallocated private data<\/p>\n<p>Several sysfs show\/store handlers call a discipline callback that<br \/>\ndereferences device-&gt;private, either directly or through the<br \/>\nDASD_DEFINE_ATTR() macro. During dasd_generic_set_online() the discipline<br \/>\nis assigned before check_device() allocates device-&gt;private, so an<br \/>\nunprivileged read of one of these world-readable attributes in that window<br \/>\ndereferences a NULL pointer and panics.<\/p>\n<p>Guard the dereference inside each callback that actually touches<br \/>\ndevice-&gt;private.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>s390\/dasd: Guard sysfs discipline callbacks against unallocated private data<\/p>\n<p>Several sysfs show\/store handlers call a discipline c<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21379","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21379","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=21379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21379"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}