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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/37ad11f20e164c23ce827dd455b42c0fdd29685c cve-icon cve-icon
https://git.kernel.org/stable/c/4f9e6ff6319dbcebea64b50af0304cf0ad7e97e7 cve-icon cve-icon
https://git.kernel.org/stable/c/808e2335bc1cf2293b9e36ccc94c267c81509c71 cve-icon cve-icon
https://git.kernel.org/stable/c/9f7c02e031570e8291a63162c6c046dc15ff85b0 cve-icon cve-icon
https://git.kernel.org/stable/c/c365e8f20f4201d873a70385bd919f0fb531e960 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025102820-CVE-2025-40080-bda1@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-40080 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-40080 cve-icon
History

Mon, 01 Dec 2025 06:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Wed, 29 Oct 2025 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Wed, 29 Oct 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Important

Tue, 28 Oct 2025 12:00:00 +0000

Type Values Removed Values Added
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.
Title nbd: restrict sockets to TCP and UDP
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-10-28T11:48:44.796Z

Updated: 2025-12-01T06:17:37.510Z

Reserved: 2025-04-16T07:20:57.160Z

Link: CVE-2025-40080

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-28T12:15:42.587

Modified: 2025-10-30T15:05:32.197

Link: CVE-2025-40080

cve-icon Redhat

Severity : Important

Publid Date: 2025-10-28T00:00:00Z

Links: CVE-2025-40080 - Bugzilla