{"id":12317,"date":"2026-09-04T18:54:16","date_gmt":"2026-09-04T10:54:16","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80638"},"modified":"2026-09-04T18:54:16","modified_gmt":"2026-09-04T10:54:16","slug":"cve-2026-80638","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80638","title":{"rendered":"CVE-2026-80638 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix out-of-bou"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ocfs2: fix out-of-bounds write in ocfs2_remove_refcount_extent<\/p>\n<p>[BUG]<br \/>\nUnlinking a refcounted file whose refcount tree has leaf blocks<br \/>\ntriggers a fortify panic due to an out-of-bounds write.<\/p>\n<p>[CAUSE]<br \/>\nWhen the last leaf block is removed from a refcount tree,<br \/>\nocfs2_remove_refcount_extent() converts the root back to leaf mode<br \/>\nwith a bulk memset on &amp;rb-&gt;rf_records. rf_records sits in an anonymous<br \/>\nunion with rf_list. rf_list.l_tree_depth aliases rf_records.rl_count,<br \/>\nand is 0 for a single-level tree. With rl_count equal to 0, the memset<br \/>\nwrites past the 16-byte declared size of rf_records, which the fortify<br \/>\nchecker catches.<\/p>\n<p>[FIX]<br \/>\nReplace the bulk memset on &amp;rb-&gt;rf_records with a correctly-bounded<br \/>\nmemset on rl_recs[] alone, after setting rl_count to the correct value.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ocfs2: fix out-of-bounds write in ocfs2_remove_refcount_extent<\/p>\n<p>[BUG]<br \/>\nUnlinking a refcounted file whose refcount tree has leaf bloc<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-12317","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/12317","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=12317"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12317"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12317"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}