CVE-2025-40080

nbd: restrict sockets to TCP and UDP

EPSS 0.2%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

28 Oct 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

References

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