{"id":80854,"date":"2026-06-21T09:48:49","date_gmt":"2026-06-21T06:18:49","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-52911-ksmbd-scope-conn-binding-slowpath-to-bound-sessions-only\/"},"modified":"2026-06-21T09:48:49","modified_gmt":"2026-06-21T06:18:49","slug":"cve-2026-52911-ksmbd-scope-conn-binding-slowpath-to-bound-sessions-only","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-52911-ksmbd-scope-conn-binding-slowpath-to-bound-sessions-only\/","title":{"rendered":"CVE-2026-52911 &#8211; ksmbd: scope conn-&gt;binding slowpath to bound sessions only"},"content":{"rendered":"<p>CVE ID :CVE-2026-52911<\/p>\n<p>  Published : June 21, 2026, 6:18 a.m. | 1\u00a0hour, 24\u00a0minutes ago<\/p>\n<p>  Description :In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ksmbd: scope conn-&gt;binding slowpath to bound sessions only<\/p>\n<p>When the binding SESSION_SETUP sets conn-&gt;binding = true, the flag stays<br \/>\nset after the call so that the global session lookup in<br \/>\nksmbd_session_lookup_all() can find the session, which was not added to<br \/>\nconn-&gt;sessions. Because the flag is connection-wide, the global lookup<br \/>\npath will also resolve any other session by id if asked.<\/p>\n<p>Tighten the global lookup so that the returned session must have this<br \/>\nconnection registered in its channel xarray (sess-&gt;ksmbd_chann_list).<br \/>\nThe channel entry is installed by the existing binding_session path in<br \/>\nntlm_authenticate()\/krb5_authenticate() when a SESSION_SETUP completes<br \/>\nsuccessfully, so this condition is a strict equivalent of &#8220;this<br \/>\nconnection has been accepted as a channel of this session&#8221;. Connections<br \/>\nthat have not bound to a given session cannot reach it via the global<br \/>\ntable.<\/p>\n<p>The existing conn-&gt;binding gate for entering the slowpath is preserved<br \/>\nso that non-binding connections keep the fast-path-only behavior, and<br \/>\nthe session-&gt;state check is unchanged.<\/p>\n<p>  Severity: 0.0 | NA<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-52911 Published : June 21, 2026, 6:18 a.m. | 1\u00a0hour, 24\u00a0minutes ago Description :In the Linux kernel, the following vulnerability has been resolved: ksmbd: scope conn-&gt;binding slowpath to bound sessions only When the binding SESSION_SETUP sets conn-&gt;binding = true, the flag stays set after the call so that the global session lookup in &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-80854","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/80854","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=80854"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/80854\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=80854"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=80854"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=80854"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}