{"id":24527,"date":"2026-09-16T20:32:26","date_gmt":"2026-09-16T12:32:26","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89840"},"modified":"2026-09-16T20:32:26","modified_gmt":"2026-09-16T12:32:26","slug":"cve-2026-89840","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89840","title":{"rendered":"CVE-2026-89840 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: validate MOVE_R"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>f2fs: validate MOVE_RANGE destination size<\/p>\n<p>F2FS_IOC_MOVE_RANGE checks the source range, but not the destination end<br \/>\nbefore updating i_size. A source hole can expose this: __clone_blkaddrs()<br \/>\nskips NULL_ADDR entries and returns success, so the caller can still extend<br \/>\nthe destination inode with unchecked pos_out + len.<\/p>\n<p>Reject destination overflow and use inode_newsize_ok() before extending<br \/>\nthe destination inode.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>f2fs: validate MOVE_RANGE destination size<\/p>\n<p>F2FS_IOC_MOVE_RANGE checks the source range, but not the destination end<br \/>\nbefore updatin<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24527","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24527","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=24527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24527"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}