{"id":"AZL-94172","summary":"CVE-2026-58218 affecting package samba 4.18.3-2","details":"A flaw was found in Samba's internal DNS server where unauthenticated TKEY registration requests were added to the TKEY name cache before being rejected. A remote, unauthenticated attacker can exploit this behavior by sending a large number of TKEY requests with arbitrary names, exhausting the cache and evicting legitimate TKEY entries. This can prevent legitimate TSIG authentication for signed DNS queries, resulting in a denial of service.","modified":"2026-09-20T05:32:18Z","published":"2026-07-30T14:17:00Z","upstream":["CVE-2026-58218"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58218"}],"affected":[{"package":{"name":"samba","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/samba"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"4.18.3-2"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-94172.json"}}],"schema_version":"1.9.0"}