{"id":"CVE-2025-40080","title":"nbd: restrict sockets to TCP and UDP","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: restrict sockets to TCP and UDP\n\nRecently, syzbot started to abuse NBD with all kinds of sockets.\n\nCommit cf1b2326b734 (\"nbd: verify socket is supported during set…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= cf1b2326b734896734c6e167e41766f9cee7686a < c365e8f20f4201d873a70385bd919f0fb531e960","Linux >= cf1b2326b734896734c6e167e41766f9cee7686a < 4f9e6ff6319dbcebea64b50af0304cf0ad7e97e7","Linux >= cf1b2326b734896734c6e167e41766f9cee7686a < 37ad11f20e164c23ce827dd455b42c0fdd29685c","Linux >= cf1b2326b734896734c6e167e41766f9cee7686a < 808e2335bc1cf2293b9e36ccc94c267c81509c71","Linux >= cf1b2326b734896734c6e167e41766f9cee7686a < 9f7c02e031570e8291a63162c6c046dc15ff85b0","Linux 4df728651b8a99693c69962d8e5a5b9e5a3bbcc7","Linux 083322455c67d278c56a66b73f1221f004ee600a","Linux 4fa1cbd587ef967812f9d9f6ce46ec1dead7502c","Linux >= 4.14.152 < 4.15","Linux >= 4.19.82 < 4.20","Linux >= 5.3.9 < 5.4","Linux 5.4"],"published":"2025-10-28","updated":"2026-09-08","sourceUpdated":"2026-09-08T08:42:47.980Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-40080","references":[{"url":"https://git.kernel.org/stable/c/c365e8f20f4201d873a70385bd919f0fb531e960"},{"url":"https://git.kernel.org/stable/c/4f9e6ff6319dbcebea64b50af0304cf0ad7e97e7"},{"url":"https://git.kernel.org/stable/c/37ad11f20e164c23ce827dd455b42c0fdd29685c"},{"url":"https://git.kernel.org/stable/c/808e2335bc1cf2293b9e36ccc94c267c81509c71"},{"url":"https://git.kernel.org/stable/c/9f7c02e031570e8291a63162c6c046dc15ff85b0"}],"tags":["cve.org"],"epss":0.00193,"epssPercentile":0.09196,"ingestedAt":"2026-09-08T15:33:26.996Z","slug":"CVE-2025-40080","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnbd: restrict sockets to TCP and UDP\n\nRecently, syzbot started to abuse NBD with all kinds of sockets.\n\nCommit cf1b2326b734 (\"nbd: verify socket is supported during setup\")\nmade sure the socket supported a shutdown() method.\n\nExplicitely accept TCP and UNIX stream sockets.\n\n## Affected\n\n- `Linux >= cf1b2326b734896734c6e167e41766f9cee7686a < c365e8f20f4201d873a70385bd919f0fb531e960`\n- `Linux >= cf1b2326b734896734c6e167e41766f9cee7686a < 4f9e6ff6319dbcebea64b50af0304cf0ad7e97e7`\n- `Linux >= cf1b2326b734896734c6e167e41766f9cee7686a < 37ad11f20e164c23ce827dd455b42c0fdd29685c`\n- `Linux >= cf1b2326b734896734c6e167e41766f9cee7686a < 808e2335bc1cf2293b9e36ccc94c267c81509c71`\n- `Linux >= cf1b2326b734896734c6e167e41766f9cee7686a < 9f7c02e031570e8291a63162c6c046dc15ff85b0`\n- `Linux 4df728651b8a99693c69962d8e5a5b9e5a3bbcc7`\n- `Linux 083322455c67d278c56a66b73f1221f004ee600a`\n- `Linux 4fa1cbd587ef967812f9d9f6ce46ec1dead7502c`\n- `Linux >= 4.14.152 < 4.15`\n- `Linux >= 4.19.82 < 4.20`\n- `Linux >= 5.3.9 < 5.4`\n- `Linux 5.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}