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Tracker / CVE-2026-31476

CVE-2026-31476

Alta 8.2

In the Linux kernel, the following vulnerability has been resolved: ksmbd: do not expire session on binding failure When a multichannel session binding request fails (e.g. wrong password), the error path unconditionally sets sess->state = SMB2_SESSION_EXPIRED. However, during binding, sess points to the target session looked up via ksmbd_session_lookup_slowpath() -- which belongs to another connection's user. This allows a remote attacker to invalidate any active session by simply sending a binding request with a wrong password (DoS). Fix this by skipping session expiration when the failed request was a binding attempt, since the session does not belong to the current connection. The reference taken by ksmbd_session_lookup_slowpath() is still correctly released via ksmbd_user_session_put().

Prodotti e versioni affette

linux linux_kernel
linux linux_kernel · 5.15.1 → 6.1.168
linux linux_kernel · 6.13 → 6.18.21
linux linux_kernel · 6.19 → 6.19.11
linux linux_kernel · 6.2 → 6.6.131
linux linux_kernel · 6.7 → 6.12.80

Analisi

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Riferimenti