{"id":28986,"date":"2026-09-25T20:31:39","date_gmt":"2026-09-25T12:31:39","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-97554"},"modified":"2026-09-25T20:31:39","modified_gmt":"2026-09-25T12:31:39","slug":"cve-2026-97554","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-97554","title":{"rendered":"CVE-2026-97554 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: avoid us"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>smb: client: avoid using uninitialized SIDs in cifs_posix_to_fattr()<\/p>\n<p>cifs_posix_to_fattr() ignores the return value of posix_info_parse().<br \/>\nWhen a malformed POSIX directory entry is encountered (e.g. invalid<br \/>\nSID lengths from an untrusted server), posix_info_parse() returns -1<br \/>\nwithout populating the &#8216;parsed&#8217; struct.  The uninitialized stack<br \/>\nmemory in parsed.owner and parsed.group is then passed to<br \/>\nsid_to_id(), which processes the garbage bytes and passes them to<br \/>\nrequest_key() to construct a SID string, potentially leaking kernel<br \/>\nstack contents to the userspace idmap daemon.<\/p>\n<p>Fix this by checking the return value and skipping the SID-to-id<br \/>\nmapping when parsing fails.  The remaining fattr fields (timestamps,<br \/>\nmode, etc.) are populated directly from the &#8216;info&#8217; pointer so they<br \/>\nare unaffected.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>smb: client: avoid using uninitialized SIDs in cifs_posix_to_fattr()<\/p>\n<p>cifs_posix_to_fattr() ignores the return value of posix_info_<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28986","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28986","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=28986"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28986"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28986"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}