{"id":28613,"date":"2026-09-25T04:31:28","date_gmt":"2026-09-24T20:31:28","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-93798"},"modified":"2026-09-25T04:31:28","modified_gmt":"2026-09-24T20:31:28","slug":"cve-2026-93798","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-93798","title":{"rendered":"CVE-2026-93798 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix reloc root"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>btrfs: fix reloc root cleanup in merge_reloc_roots()<\/p>\n<p>If the root we got has zero root refs in its root item, we are resetting<br \/>\nthe root&#8217;s -&gt;reloc_root without using barriers like we do everywhere else.<br \/>\nSashiko complained about this while reviewing another patch, and it&#8217;s<br \/>\ncorrect (see the Link tag below).<\/p>\n<p>Also, we should not clear BTRFS_ROOT_DEAD_RELOC_TREE from the root unless<br \/>\nthe root points to the reloc root we have.<\/p>\n<p>Fix this by using clear_reloc_root(), which issues the memory barrier<br \/>\nafter setting the root&#8217;s -&gt;reloc_root to NULL and before clearing the bit<br \/>\nBTRFS_ROOT_DEAD_RELOC_TREE from the root.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>btrfs: fix reloc root cleanup in merge_reloc_roots()<\/p>\n<p>If the root we got has zero root refs in its root item, we are resetting<br \/>\nthe <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28613","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28613","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=28613"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28613"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28613"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}