{"cve":"CVE-2023-42670","nvd":{"published":"2023-11-03T08:15:07.883","modified":"2026-06-17T06:24:13.653","status":"Modified","description":"A flaw was found in Samba. It is susceptible to a vulnerability where multiple incompatible RPC listeners can be initiated, causing disruptions in the AD DC service. When Samba's RPC server experiences a high load or unresponsiveness, servers intended for non-AD DC purposes (for example, NT4-emulation \"classic DCs\") can erroneously start and compete for the same unix domain sockets. This issue leads to partial query responses from the AD DC, causing issues such as \"The procedure number is out of range\" when using tools like Active Directory Users. This flaw allows an attacker to disrupt AD DC services.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-400"],"references":["https://access.redhat.com/security/cve/CVE-2023-42670","https://bugzilla.redhat.com/show_bug.cgi?id=2241885","https://bugzilla.samba.org/show_bug.cgi?id=15473","https://www.samba.org/samba/security/CVE-2023-42670.html","https://access.redhat.com/security/cve/CVE-2023-42670"],"products":["fedoraproject:fedora","samba:samba"],"source":"nvd","synced_at":"2026-10-19T21:40:11.519948003+00:00"},"epss":{"cve":"CVE-2023-42670","score":0.01317,"percentile":0.708,"date":"2026-10-31"},"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."]}