Upstream information

CVE-2025-40133 at MITRE

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().

SUSE information

Overall state of this security issue: Does not affect SUSE products

SUSE Bugzilla entry: 1253328 [NEW]

No SUSE Security Announcements cross referenced.

SUSE Timeline for this CVE

CVE page created: Wed Nov 12 18:29:51 2025
CVE page last modified: Wed Nov 12 18:29:51 2025