{"id":21667,"date":"2026-09-12T04:31:29","date_gmt":"2026-09-11T20:31:29","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89745"},"modified":"2026-09-12T04:31:29","modified_gmt":"2026-09-11T20:31:29","slug":"cve-2026-89745","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89745","title":{"rendered":"CVE-2026-89745 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ndebugfs: Fix lockdown"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>debugfs: Fix lockdown check for mmap_prepare<\/p>\n<p>Commit 651fdda8406d (&#8220;relay: update relay to use mmap_prepare&#8221;)<br \/>\nchanged the `mmap` file operation to `mmap_prepare` for relayfs, but<br \/>\nthe lockdown check in debugfs was not updated accordingly.<\/p>\n<p>This prevents debugfs from being locked down when the kernel is in<br \/>\nintegrity mode if a file uses `mmap_prepare` but not `mmap`.<\/p>\n<p>Since the conversion to `mmap_prepare` across the kernel is not yet<br \/>\ncomplete, update the lockdown check to look for both `mmap` and<br \/>\n`mmap_prepare` to ensure comprehensive coverage.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>debugfs: Fix lockdown check for mmap_prepare<\/p>\n<p>Commit 651fdda8406d (&#8220;relay: update relay to use mmap_prepare&#8221;)<br \/>\nchanged the `mmap` fi<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21667","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21667","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=21667"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21667"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21667"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}