ksmbd: Fix refcount leak when invalid session is found on session lookup
CVE-2025-71150 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-71150, released January 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.
In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix refcount leak when invalid session is found on session lookup When a session is found but its state is not SMB2_SESSION_VALID, It indicates that no valid session was found, but it is missing to decrement the reference count acquired by the session lookup, which results in a reference count leak. This patch fixes the issue by explicitly calling ksmbd_user_session_put to release the reference to the session.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 6.1.162-1 | DEBIAN-CVE-2025-71150 | Jan 23, 2026 |
| linux · Debian 13.5 (trixie) | 6.12.69-1 | DEBIAN-CVE-2025-71150 | Jan 23, 2026 |
| linux · Debian 14 | 6.18.3-1 | DEBIAN-CVE-2025-71150 | Jan 23, 2026 |
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