What’s Vulnerable › Vulnerabilities

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

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-21

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.

Affected products

• Linux kernel: 5.15 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0875872718b98e8530fbc634e5aa7dbd3253b80d
• https://git.kernel.org/stable/c/1ff0e41afbe73240a7d7b96d4e8e86d0aaf0fe0b
• https://git.kernel.org/stable/c/3d66f3ec3c69fa242939a9f9e6815df33390b1bb
• https://git.kernel.org/stable/c/3deefd5fb1368e2577144b0961b1a5df26b587d1
• https://git.kernel.org/stable/c/c50e628122aed077695669e25b842e778511a43d

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