Not yet scoredPublished Oct 28, 2025

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

Updated under an hour ago (Oct 27, 2026, 1:30 AM ET)

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It affects Linux and 3 other products. Add what you run to find out whether that includes you.

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from cf1b2326b734896734c6e167e41766f9cee7686a before c365e8f20f4201d873a70385bd919f0fb531e960; from cf1b2326b734896734c6e167e41766f9cee7686a before 4f9e6ff6319dbcebea64b50af0304cf0ad7e97e7; from cf1b2326b734896734c6e167e41766f9cee7686a before 37ad11f20e164c23ce827dd455b42c0fdd29685c; from cf1b2326b734896734c6e167e41766f9cee7686a before 808e2335bc1cf2293b9e36ccc94c267c81509c71; from cf1b2326b734896734c6e167e41766f9cee7686a before 9f7c02e031570e8291a63162c6c046dc15ff85b0; 4df728651b8a99693c69962d8e5a5b9e5a3bbcc7; 083322455c67d278c56a66b73f1221f004ee600a; 4fa1cbd587ef967812f9d9f6ce46ec1dead7502c; and 3 more ranges	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP

References

References

https://git.kernel.org/stable/c/c365e8f20f4201d873a70385bd919f0fb531e960
https://git.kernel.org/stable/c/4f9e6ff6319dbcebea64b50af0304cf0ad7e97e7
https://git.kernel.org/stable/c/37ad11f20e164c23ce827dd455b42c0fdd29685c
https://git.kernel.org/stable/c/808e2335bc1cf2293b9e36ccc94c267c81509c71
https://git.kernel.org/stable/c/9f7c02e031570e8291a63162c6c046dc15ff85b0
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-457936.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.