{"id":25908,"date":"2026-09-18T04:32:04","date_gmt":"2026-09-17T20:32:04","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-93049"},"modified":"2026-09-18T04:32:04","modified_gmt":"2026-09-17T20:32:04","slug":"cve-2026-93049","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-93049","title":{"rendered":"CVE-2026-93049 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: mtdswap: Avoid f"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>mtd: mtdswap: Avoid freeing registered blktrans device twice<\/p>\n<p>In mtdswap_add_mtd(), debugfs setup failure after successful blktrans<br \/>\nregistration can free mbd_dev twice.<\/p>\n<p>add_mtd_blktrans_dev() initializes the blktrans device reference and<br \/>\npublishes the disk. Once that succeeds, del_mtd_blktrans_dev() tears the<br \/>\ndisk down and drops the blktrans reference; when that reference reaches<br \/>\nzero, blktrans_dev_release() frees the mtd_blktrans_dev.<\/p>\n<p>The debugfs failure path called del_mtd_blktrans_dev(mbd_dev), then fell<br \/>\nthrough the common cleanup label and called kfree(mbd_dev) again. Clear<br \/>\nthe local pointer after deregistration so the common cleanup can still<br \/>\nrelease the mtdswap state without freeing the blktrans object twice.<\/p>\n<p>This issue was found by a static analysis checker and confirmed by<br \/>\nmanual source review.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>mtd: mtdswap: Avoid freeing registered blktrans device twice<\/p>\n<p>In mtdswap_add_mtd(), debugfs setup failure after successful blktrans<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25908","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25908","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=25908"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25908"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25908"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}