CVE-2025-40133
High
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().
SeverityHigh
CVSS8.1
Exploit probability—
Product
Linux
PublishedNov 12, 2025
First seenNov 12, 2025
How to fix
Update
- Linux Linuxad16235c9d3ef7ec17c109ff39b7504f49d17072, cc976ec9e38bb79409de3261ba1dbb6868e2a53e, 893c49a78d9f85e4b8081b908fb7c407d018106a or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 27069e7cb3d1cea9377069266acf19b9cc5ad0ae ≤ v < ad16235c9d3ef7ec17c109ff39b7504f49d17072, 27069e7cb3d1cea9377069266acf19b9cc5ad0ae ≤ v < cc976ec9e38bb79409de3261ba1dbb6868e2a53e, 27069e7cb3d1cea9377069266acf19b9cc5ad0ae ≤ v < 893c49a78d9f85e4b8081b908fb7c407d018106a, 6.12 | ad16235c9d3ef7ec17c109ff39b7504f49d17072, cc976ec9e38bb79409de3261ba1dbb6868e2a53e, 893c49a78d9f85e4b8081b908fb7c407d018106a |
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