CVE-2025-40133

Published: November 14, 2025Last modified: November 14, 2025

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 it's not always under RCU. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dst_dev_rcu().

Status

References

• https://git.kernel.org/stable/c/893c49a78d9f85e4b8081b908fb7c407d018106a
• https://git.kernel.org/stable/c/ad16235c9d3ef7ec17c109ff39b7504f49d17072
• https://git.kernel.org/stable/c/cc976ec9e38bb79409de3261ba1dbb6868e2a53e