{"id":21536,"date":"2026-09-12T04:31:19","date_gmt":"2026-09-11T20:31:19","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89614"},"modified":"2026-09-12T04:31:19","modified_gmt":"2026-09-11T20:31:19","slug":"cve-2026-89614","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89614","title":{"rendered":"CVE-2026-89614 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: bound the free-"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ntfs: bound the free-cluster bitmap scan to the volume<\/p>\n<p>vol-&gt;lcn_empty_bits_per_page is sized from vol-&gt;nr_clusters at mount, but<br \/>\nntfs_cluster_alloc() bounds its scan of that array by the size of $Bitmap.<br \/>\nThose are independent on-disk quantities and the mount-time check only<br \/>\nrejects a $Bitmap that is too small, so an image whose $Bitmap covers more<br \/>\nclusters than the volume has lets the scan index past the array.  A run<br \/>\nwhose LCN lies in that gap takes the allocator straight there, since the<br \/>\ncaller passes the file&#8217;s own last LCN as its locality hint.  KASAN reports<br \/>\na slab out-of-bounds read when a file on such a volume is extended.<\/p>\n<p>Clamp the scan to what that array covers, mirroring the max_index<br \/>\ncalculation the mount-time scan already uses, and reject a decoded LCN<br \/>\nat or beyond nr_clusters in the mapping pairs decoder.  Conforming<br \/>\nvolumes are unaffected.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ntfs: bound the free-cluster bitmap scan to the volume<\/p>\n<p>vol-&gt;lcn_empty_bits_per_page is sized from vol-&gt;nr_clusters at mount, but<br \/>\nn<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21536","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21536","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=21536"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21536"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}