{"id":21515,"date":"2026-09-12T04:31:17","date_gmt":"2026-09-11T20:31:17","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89593"},"modified":"2026-09-12T04:31:17","modified_gmt":"2026-09-11T20:31:17","slug":"cve-2026-89593","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89593","title":{"rendered":"CVE-2026-89593 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nhugetlb: only adjust"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>hugetlb: only adjust reservation during unmapping if mapcount is 0<\/p>\n<p>Since df7a6d1f6405, __unmap_hugepage_range can adjust reservations.  In<br \/>\nthe case of folio mapped in both a parent and a child, if the parent<br \/>\nunmaps the range first, the reservation adjustment will result in an<br \/>\nunderflow of the reserved count.  Once the child unmaps the range, the<br \/>\ncount is restored.  Change __unmap_hugepage_range() to check the mapcount<br \/>\nbefore adjusting the reservation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>hugetlb: only adjust reservation during unmapping if mapcount is 0<\/p>\n<p>Since df7a6d1f6405, __unmap_hugepage_range can adjust reservati<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21515","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21515","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=21515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}