CVE-2025-40133

Summary

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().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux27069e7cb3d1cea9377069266acf19b9cc5ad0ae < ad16235c9d3ef7ec17c109ff39b7504f49d17072affected
LinuxLinux27069e7cb3d1cea9377069266acf19b9cc5ad0ae < cc976ec9e38bb79409de3261ba1dbb6868e2a53eaffected
LinuxLinux27069e7cb3d1cea9377069266acf19b9cc5ad0ae < 893c49a78d9f85e4b8081b908fb7c407d018106aaffected
LinuxLinux6.12affected
LinuxLinux0 < 6.12unaffected
LinuxLinux6.12.55 <= 6.12.*unaffected
LinuxLinux6.17.3 <= 6.17.*unaffected
LinuxLinux6.18 <= *unaffected

Weaknesses

References