{"id":21607,"date":"2026-09-12T04:31:24","date_gmt":"2026-09-11T20:31:24","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89685"},"modified":"2026-09-12T04:31:24","modified_gmt":"2026-09-11T20:31:24","slug":"cve-2026-89685","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89685","title":{"rendered":"CVE-2026-89685 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix clock domai"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>nfsd: fix clock domain mismatch in clients_still_reclaiming()<\/p>\n<p>clients_still_reclaiming() computes a deadline from nn-&gt;boot_time<br \/>\n(CLOCK_REALTIME, ~1.7 billion) but compares it against<br \/>\nktime_get_boottime_seconds() (CLOCK_BOOTTIME, seconds since boot).<br \/>\nThe comparison is always false \u2014 it would take ~54 years of uptime<br \/>\nfor BOOTTIME to exceed the REALTIME-derived deadline.<\/p>\n<p>This means any client can hold the server in grace indefinitely by<br \/>\nsending CLAIM_PREVIOUS OPEN requests, blocking all non-reclaim<br \/>\noperations for all other clients.<\/p>\n<p>Add boot_time_bt (CLOCK_BOOTTIME) alongside the existing boot_time<br \/>\nand use it for the deadline computation. boot_time (CLOCK_REALTIME)<br \/>\nis preserved for its cl_boot clientid-nonce role.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>nfsd: fix clock domain mismatch in clients_still_reclaiming()<\/p>\n<p>clients_still_reclaiming() computes a deadline from nn-&gt;boot_time<br \/>\n(C<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21607","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21607","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=21607"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21607"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}