7.5

CVE-2026-3039

BIND 9 server memory exhaustion during GSS-API TKEY negotiation

BIND servers that are configured to use TKEY-based authentication via GSS-API tokens are vulnerable to excessive memory consumption when receiving and processing maliciously-constructed packets.  Typically these servers will be found in Active Directory integrated DNS deployments and/or Kerberos-secured DNS environments.
This issue affects BIND 9 versions 9.0.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.9.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Isc ≫ Bind SwEdition- Version >= 9.0.0 <= 9.16.50
Isc ≫ Bind SwEdition- Version >= 9.18.0 < 9.18.49
Isc ≫ Bind SwEdition- Version >= 9.20.0 < 9.20.23
Isc ≫ Bind SwEdition- Version >= 9.21.0 < 9.21.22
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.05% 0.599
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-officer@isc.org 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-770 Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

CWE-771 Missing Reference to Active Allocated Resource

The product does not properly maintain a reference to a resource that has been allocated, which prevents the resource from being reclaimed.

https://downloads.isc.org/isc/bind9/9.18.49
Patch
https://downloads.isc.org/isc/bind9/9.20.23
Patch
https://downloads.isc.org/isc/bind9/9.21.22
Patch
https://kb.isc.org/docs/cve-2026-3039
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:20334
https://access.redhat.com/errata/RHSA-2026:23360
https://access.redhat.com/errata/RHSA-2026:24338
https://access.redhat.com/errata/RHSA-2026:24339
https://access.redhat.com/errata/RHSA-2026:24367
https://access.redhat.com/errata/RHSA-2026:24368
https://access.redhat.com/security/cve/CVE-2026-3039
https://bugzilla.redhat.com/show_bug.cgi?id=2479767
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3039.json