Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat Enterprise Linux 10 | unknown |
| Red Hat / Red Hat Enterprise Linux 6 | unknown |
| Red Hat / Red Hat Enterprise Linux 6 | unknown |
| Red Hat / Red Hat Enterprise Linux 7 | unknown |
| Red Hat / Red Hat Enterprise Linux 8 | unknown |
| Red Hat / Red Hat Enterprise Linux 9 | unknown |
| Red Hat / Red Hat OpenShift Container Platform 4 | unknown |
CWE
CWE-410
References
- https://access.redhat.com/security/cve/CVE-2026-58218
- https://bugzilla.redhat.com/show_bug.cgi?id=2502728
- https://bugzilla.samba.org/show_bug.cgi?id=16115
- https://www.samba.org/samba/security/CVE-2026-58218.html
ADP enrichment
No English description supplied.
No references supplied.