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URL: https://nvd.nist.gov/vuln/detail/CVE-2026-52911

⇱ NVD - CVE-2026-52911

  1. Vulnerabilities

CVE-2026-52911 Detail

Received

This CVE record has recently been published to the CVE List and has been included within the NVD dataset.

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: scope conn->binding slowpath to bound sessions only When the binding SESSION_SETUP sets conn->binding = true, the flag stays set after the call so that the global session lookup in ksmbd_session_lookup_all() can find the session, which was not added to conn->sessions. Because the flag is connection-wide, the global lookup path will also resolve any other session by id if asked. Tighten the global lookup so that the returned session must have this connection registered in its channel xarray (sess->ksmbd_chann_list). The channel entry is installed by the existing binding_session path in ntlm_authenticate()/krb5_authenticate() when a SESSION_SETUP completes successfully, so this condition is a strict equivalent of "this connection has been accepted as a channel of this session". Connections that have not bound to a given session cannot reach it via the global table. The existing conn->binding gate for entering the slowpath is preserved so that non-binding connections keep the fast-path-only behavior, and the session->state check is unchanged.


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/1e2bec062c5c9ec282636715166056d0998d746d kernel.org
https://git.kernel.org/stable/c/1ff46c9915c1cbf454db58a8cb87f7cac818e6a6 kernel.org
https://git.kernel.org/stable/c/2cc8a4db633b10715450b291c1343859a4b2c509 kernel.org
https://git.kernel.org/stable/c/974c1c224e85549dc3459f3bb2255bbbdd2b9372 kernel.org
https://git.kernel.org/stable/c/b0da97c034b6107d14e537e212d4ce8b22109a58 kernel.org
https://git.kernel.org/stable/c/e3a93ce6e25757b8f375e38b8f91e1d9da4edc1a kernel.org
https://git.kernel.org/stable/c/e74c00c6af428a39e564cdc5bd3a3648c6d8de87 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

CVE Modified by kernel.org 6/28/2026 4:16:22 AM

Action Type Old Value New Value
Added CVSS V3.1 
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

New CVE Received from kernel.org 6/21/2026 4:16:23 AM

Action Type Old Value New Value
Added Description 
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: scope conn->binding slowpath to bound sessions only

When the binding SESSION_SETUP sets conn->binding = true, the flag stays
set after the call so that the global session lookup in
ksmbd_session_lookup_all() can find the session, which was not added to
conn->sessions. Because the flag is connection-wide, the global lookup
path will also resolve any other session by id if asked.

Tighten the global lookup so that the returned session must have this
connection registered in its channel xarray (sess->ksmbd_chann_list).
The channel entry is installed by the existing binding_session path in
ntlm_authenticate()/krb5_authenticate() when a SESSION_SETUP completes
successfully, so this condition is a strict equivalent of "this
connection has been accepted as a channel of this session". Connections
that have not bound to a given session cannot reach it via the global
table.

The existing conn->binding gate for entering the slowpath is preserved
so that non-binding connections keep the fast-path-only behavior, and
the session->state check is unchanged.
Added Reference 
https://git.kernel.org/stable/c/1e2bec062c5c9ec282636715166056d0998d746d
Added Reference 
https://git.kernel.org/stable/c/1ff46c9915c1cbf454db58a8cb87f7cac818e6a6
Added Reference 
https://git.kernel.org/stable/c/2cc8a4db633b10715450b291c1343859a4b2c509
Added Reference 
https://git.kernel.org/stable/c/974c1c224e85549dc3459f3bb2255bbbdd2b9372
Added Reference 
https://git.kernel.org/stable/c/b0da97c034b6107d14e537e212d4ce8b22109a58
Added Reference 
https://git.kernel.org/stable/c/e3a93ce6e25757b8f375e38b8f91e1d9da4edc1a
Added Reference 
https://git.kernel.org/stable/c/e74c00c6af428a39e564cdc5bd3a3648c6d8de87
Added Affected Record truncated, showing 2048 of 2235 characters.
View Entire Change Record
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Quick Info

CVE Dictionary Entry:
CVE-2026-52911
NVD Published Date:
06/21/2026
NVD Last Modified:
06/28/2026
Source:
kernel.org