{"cve":"CVE-2025-40056","nvd":{"published":"2025-10-28T12:15:39.907","modified":"2026-10-19T21:10:00.160","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvhost: vringh: Fix copy_to_iter return value check\n\nThe return value of copy_to_iter can't be negative, check whether the\ncopied length is equal to the requested length instead of checking for\nnegative values.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/439263376c2c4e126cac0d07e4987568de4eaba5","https://git.kernel.org/stable/c/68aac2b335d474b938d154b9c95cbc58838cb2ce","https://git.kernel.org/stable/c/781226e11d5bdea0d69c7b5aa3cda874093c73b8","https://git.kernel.org/stable/c/b3a950d236e98440c07405ba597b11bce56a8050","https://git.kernel.org/stable/c/bd71e7e0a612740e4de5524880c7cd40293af5f7"],"products":[],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2025-40056","score":0.00216,"percentile":0.11854,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}