Security Advisory

CVE-2025-40133

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2025-11-12 10:23:22

Last updated 2026-05-11 21:43:23

Assigner Linux

State PUBLISHED

Description

In the Linux kernel, the following vulnerability has been resolved: mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable(). mptcp_active_enable() is called from subflow_finish_connect(), which is icsk->icsk_af_ops->sk_rx_dst_set() and its not always under RCU. Using sk_dst_get(sk)->dev could trigger UAF. Lets use __sk_dst_get() and dst_dev_rcu().

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