GHSA-q2wv-3qj8-h2hqHighCVSS 8.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: Use __sk_dst_get()...

Published
November 12, 2025
Last Modified
July 30, 2026

🔗 CVE IDs covered (1)

CVE-2025-40133 →

📋 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().

🔗 References (5)