{"id":21498,"date":"2026-09-12T04:31:16","date_gmt":"2026-09-11T20:31:16","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89576"},"modified":"2026-09-12T04:31:16","modified_gmt":"2026-09-11T20:31:16","slug":"cve-2026-89576","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89576","title":{"rendered":"CVE-2026-89576 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ndm-era: fix shadowed"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>dm-era: fix shadowed superblock leak on take-snap failure<\/p>\n<p>metadata_take_snap() bumps the live superblock refcount and then<br \/>\ndm_tm_shadow_block() allocates a new block for the metadata snapshot.<br \/>\nIf the subsequent dm_sm_inc_block() of writeset_tree_root or<br \/>\nera_array_root fails, the function only unlocks the clone and<br \/>\nreturns.  The newly allocated shadow block is never returned to the<br \/>\nmetadata space map, so each failed take-snap permanently leaks one<br \/>\nmetadata block.<\/p>\n<p>Free the clone with dm_sm_dec_block() on those error paths, matching<br \/>\nthe final step of metadata_drop_snap().<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>dm-era: fix shadowed superblock leak on take-snap failure<\/p>\n<p>metadata_take_snap() bumps the live superblock refcount and then<br \/>\ndm_tm_s<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21498","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21498","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=21498"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21498"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21498"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}