# CVE-2025-40135

## Summary

- **CVE ID:** CVE-2025-40135
- **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 8, 2026

## Description

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

ipv6: use RCU in ip6_xmit()

Use RCU in ip6_xmit() in order to use dst_dev_rcu() to prevent
possible UAF.

## Affected Products

- Linux — Linux (4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36)
- Linux — Linux (4.13)
- Linux — Linux (0)
- Linux — Linux (6.17.3)
- Linux — Linux (6.18)
- Linux — Linux (6.1.167)
- Linux — Linux (6.6.130)
- Linux — Linux (6.12.78)

## References

- [CNA](https://git.kernel.org/stable/c/f7f9e924f23684b4b23cd9f976cceab24a968e34)
- [CNA](https://git.kernel.org/stable/c/9085e56501d93af9f2d7bd16f7fcfacdde47b99c)
- [CNA](https://git.kernel.org/stable/c/f0a54d00d2f36de40266f47c27989853e8588656)
- [CNA](https://git.kernel.org/stable/c/f69fec6287565fdeb61f65e700a1184352306943)
- [CNA](https://git.kernel.org/stable/c/bd0905e2122e3680968cd0741966983490bf2ed3)
- [siemens-SADP](https://cert-portal.siemens.com/productcert/html/ssa-082556.html)
- [siemens-SADP](https://cert-portal.siemens.com/productcert/html/ssa-019113.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.55%
- **EPSS Percentile:** 44.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._