VDB
CVE-2026-58218
CVE-2026-58218
PUBLISHED
CVSS 5.3 MEDIUM
Reported by redhat · Published July 30, 2026
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.
Risk Scores
CVSS 3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | |
| Red Hat | Red Hat Enterprise Linux 6 | |
| Red Hat | Red Hat Enterprise Linux 6 | |
| Red Hat | Red Hat Enterprise Linux 7 | |
| Red Hat | Red Hat Enterprise Linux 8 | |
| Red Hat | Red Hat Enterprise Linux 9 | |
| Red Hat | Red Hat OpenShift Container Platform 4 | |
| Red Hat | Red Hat Enterprise Linux 6 | |
| Red Hat | Red Hat Enterprise Linux 10 | |
| alpine | samba | 0, 0, 0 |
| Red Hat | Red Hat Enterprise Linux 8 | |
| Red Hat | Red Hat Enterprise Linux 9 | |
| Red Hat | Red Hat Enterprise Linux 7 | |
| Red Hat | Red Hat OpenShift Container Platform 4 | |
| Red Hat | Red Hat Enterprise Linux 6 |
Timeline
- Jul 28, 2026 CVE Published
- Jul 30, 2026 Coalition ESS Score
- Jul 30, 2026 CVE Updated
- Aug 7, 2026 EPSS Score
References
- vdb-entryx_refsource_REDHAT
- RHBZ#2502728 issue-trackingx_refsource_REDHAT