{"id":14887,"date":"2026-09-04T19:02:16","date_gmt":"2026-09-04T11:02:16","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-63812"},"modified":"2026-09-04T19:02:16","modified_gmt":"2026-09-04T11:02:16","slug":"cve-2026-63812","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-63812","title":{"rendered":"CVE-2026-63812 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix incorrect F"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>f2fs: fix incorrect FI_NO_EXTENT handling in __destroy_extent_node()<\/p>\n<p>When __destroy_extent_node() sets the inode flag FI_NO_EXTENT, it does<br \/>\nnot reset the length of the largest extent to 0 and update the inode<br \/>\nfolio. Since modifications to the extent tree are disallowed afterward,<br \/>\nthe cached largest extent may become stale. This can trigger the<br \/>\nfollowing error in xfstests generic\/388:<\/p>\n<p>F2FS-fs (dm-0): sanity_check_extent_cache: inode (ino=1761) extent info [220057, 57, 6] is incorrect, run fsck to fix<\/p>\n<p>In the f2fs_drop_inode path, __destroy_extent_node() does not need to<br \/>\nguarantee that et-&gt;node_cnt is 0, because concurrency with writeback<br \/>\nis expected in this path, and writeback may update the extent cache.<\/p>\n<p>This patch reverts commit ed78aeebef05 (&#8220;f2fs: fix node_cnt race between<br \/>\nextent node destroy and writeback&#8221;), and remove the unnecessary zero<br \/>\ncheck of et-&gt;node_cnt.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>f2fs: fix incorrect FI_NO_EXTENT handling in __destroy_extent_node()<\/p>\n<p>When __destroy_extent_node() sets the inode flag FI_NO_EXTENT<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-14887","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/14887","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=14887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}