2406775 – (CVE-2025-40080) CVE-2025-40080 kernel: nbd: restrict sockets to TCP and UDP

Bug 2406775 (CVE-2025-40080) - CVE-2025-40080 kernel: nbd: restrict sockets to TCP and UDP

Summary: CVE-2025-40080 kernel: nbd: restrict sockets to TCP and UDP

Keywords:
Status:	NEW
Alias:	CVE-2025-40080
Product:	Security Response
Classification:	Other
Component:	vulnerability
Sub Component:
Version:	unspecified
Hardware:	All
OS:	Linux
Priority:	medium
Severity:	medium
Target Milestone:	---
Assignee:	Product Security DevOps Team
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+	depends on / blocked

Reported:	2025-10-28 12:04 UTC by OSIDB Bzimport
Modified:	2026-06-29 16:14 UTC (History)
CC List:	2 users (show)
Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments	(Terms of Use)

Description OSIDB Bzimport 2025-10-28 12:04:53 UTC

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.

Comment 1 Jon Moroney 2025-10-28 20:34:57 UTC Comment hidden (spam)

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