CVEvulnerability
CVE-2026-58218
5.3 MEDIUM
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-07-30
- Last modified
- 2026-07-30
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weaknesses
- CWE-410
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.
Related
Weakness · CWE (1)
- CWE-410 Insufficient Resource Pool weakness
References
- https://access.redhat.com/security/cve/CVE-2026-58218 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2502728 bugzilla.redhat.com
- https://bugzilla.samba.org/show_bug.cgi?id=16115 bugzilla.samba.org
- https://www.samba.org/samba/security/CVE-2026-58218.html www.samba.org