# CVE-2025-40168

## Summary

- **CVE ID:** CVE-2025-40168
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Nov 12, 2025
- **Last Modified:** Sep 2, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:

smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().

smc_clc_prfx_match() is called from smc_listen_work() and
not under RCU nor RTNL.

Using sk_dst_get(sk)->dev could trigger UAF.

Let's use __sk_dst_get() and dst_dev_rcu().

Note that the returned value of smc_clc_prfx_match() is not
used in the caller.

## Affected Products

- Linux — Linux (a046d57da19f812216f393e7c535f5858f793ac3)
- Linux — Linux (4.11)
- Linux — Linux (0)
- Linux — Linux (6.17.3)
- Linux — Linux (6.18)
- Linux — Linux (6.1.187)
- Linux — Linux (6.6.156)
- Linux — Linux (6.12.108)

## References

- [CNA](https://git.kernel.org/stable/c/d26e80f7fb62d77757b67a1b94e4ac756bc9c658)
- [CNA](https://git.kernel.org/stable/c/235f81045c008169cc4e1955b4a64e118eebe61b)
- [CNA](https://git.kernel.org/stable/c/3f119c37aa293af41400cccb3d89fab8dcf774b0)
- [CNA](https://git.kernel.org/stable/c/4f5f52a5842937f945582a93cb9daed9ea526fee)
- [CNA](https://git.kernel.org/stable/c/326e5cf301d0bec0a672aa834d8254c4f9df6255)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.39%
- **EPSS Percentile:** 32.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._