# CVE-2025-40080

## Summary

- **CVE ID:** CVE-2025-40080
- **Severity:** UNKNOWN
- **CVSS Score:** 1.51
- **CWE:** N/A
- **Published:** Oct 28, 2025
- **Last Modified:** Sep 17, 2026

## Description

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

nbd: restrict sockets to TCP and UDP

Recently, syzbot started to abuse NBD with all kinds of sockets.

Commit cf1b2326b734 ("nbd: verify socket is supported during setup")
made sure the socket supported a shutdown() method.

Explicitely accept TCP and UNIX stream sockets.

## Affected Products

- Linux — Linux (cf1b2326b734896734c6e167e41766f9cee7686a)
- Linux — Linux (4df728651b8a99693c69962d8e5a5b9e5a3bbcc7)
- Linux — Linux (083322455c67d278c56a66b73f1221f004ee600a)
- Linux — Linux (4fa1cbd587ef967812f9d9f6ce46ec1dead7502c)
- Linux — Linux (5.4)
- Linux — Linux (0)
- Linux — Linux (6.1.156)
- Linux — Linux (6.6.112)
- Linux — Linux (6.12.53)
- Linux — Linux (6.17.3)
- Linux — Linux (6.18)
- Linux — Linux (4.14.152)
- Linux — Linux (4.19.82)
- Linux — Linux (5.3.9)

## References

- [CNA](https://git.kernel.org/stable/c/c365e8f20f4201d873a70385bd919f0fb531e960)
- [CNA](https://git.kernel.org/stable/c/4f9e6ff6319dbcebea64b50af0304cf0ad7e97e7)
- [CNA](https://git.kernel.org/stable/c/37ad11f20e164c23ce827dd455b42c0fdd29685c)
- [CNA](https://git.kernel.org/stable/c/808e2335bc1cf2293b9e36ccc94c267c81509c71)
- [CNA](https://git.kernel.org/stable/c/9f7c02e031570e8291a63162c6c046dc15ff85b0)
- [siemens-SADP](https://cert-portal.siemens.com/productcert/html/ssa-019113.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.19%
- **EPSS Percentile:** 9.2

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