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
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-10-28 12:04 UTC by OSIDB Bzimport
Modified: 2025-10-28 20:37 UTC (History)
0 users

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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 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025102820-CVE-2025-40080-bda1@gregkh/T
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