CVE-2025-40133

Linux Kernel 6.12.0-6.12.54, 6.13.0-6.17.2 - Use-After-Free in mptcp_active_enable()

Title source: llm

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 (3)

Core 3

Core References

Patch

https://git.kernel.org/stable/c/ad16235c9d3ef7ec17c109ff39b7504f49d17072

Patch

https://git.kernel.org/stable/c/cc976ec9e38bb79409de3261ba1dbb6868e2a53e

Patch

https://git.kernel.org/stable/c/893c49a78d9f85e4b8081b908fb7c407d018106a

Scores

EPSS 0.0019

EPSS Percentile 9.3%

Details

Status published

Products (10)

linux/Kernel 6.12.0 - 6.12.55linux

linux/Kernel 6.13.0 - 6.17.3linux

Linux/Linux < 6.12

Linux/Linux 27069e7cb3d1cea9377069266acf19b9cc5ad0ae - 893c49a78d9f85e4b8081b908fb7c407d018106a

Linux/Linux 27069e7cb3d1cea9377069266acf19b9cc5ad0ae - ad16235c9d3ef7ec17c109ff39b7504f49d17072

Linux/Linux 27069e7cb3d1cea9377069266acf19b9cc5ad0ae - cc976ec9e38bb79409de3261ba1dbb6868e2a53e

Linux/Linux 6.12

Linux/Linux 6.12.55 - 6.12.*

Linux/Linux 6.17.3 - 6.17.*

Linux/Linux 6.18

Published Nov 12, 2025

Tracked Since Feb 18, 2026