Detections
Analytics
CVE-2026-58218
medium
Description
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.
References
https://www.samba.org/samba/security/CVE-2026-58218.html
https://bugzilla.samba.org/show_bug.cgi?id=16115