# CVE-2026-90154: ksmbd: scope session state changes to bound connections

CVE-2026-90154 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-90154, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-90154
- Priority: High
- CVSS: 7.1 (Moderate)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 17, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90154

## Description

In the Linux kernel, the following vulnerability has been resolved:  ksmbd: scope session state changes to bound connections  ksmbd_all_conn_set_status() treats every connection whose transient binding flag is set as belonging to the target SessionId.  A logoff or session replacement can consequently move an unrelated connection to NEED_RECONNECT or NEED_SETUP.  Pass the target session itself and select connections using either the connection-local session xarray or the session's permanent channel list. Use the same association test while waiting for requests to drain.  Serialize session-wide status changes under request_lock and do not overwrite EXITING or RELEASING. Protect the shutdown transition with the same lock so a concurrent session update cannot revive a closing connection.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.115-2 | [DEBIAN-CVE-2026-90154](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90154.md) | Sep 23, 2026 |
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-90154](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90154.md) | Sep 23, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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