CVE-2025-71150: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: from 5.15.176, before 5.16 (fixed in 5.16); from 6.1.121, before 6.1.160 (fixed in 6.1.160); from 6.6.67, before 6.6.120 (fixed in 6.6.120); from 6.12.6, before 6.12.64 (fixed in 6.12.64); from 6.13.1, before 6.18.3 (fixed in 6.18.3); version 6.13 only; …

Published 2026-01-23. Last modified 2026-07-30.