7.5

CVE-2026-19667

Medienbericht

Remote assertion failure via 16-bit length truncation in `dns_ncache_add()`

If an attacker-controlled authoritative server can produce a negative answer that is exactly 65536 bytes, then a flaw in `named` results in a negative cache entry of 0 bytes. When this entry is subsequently read, `named` aborts.
This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerISC
≫
Produkt BIND 9
Default Statusunaffected
Version <= 9.18.50
Version 9.11.0
Status affected
Version <= 9.20.27
Version 9.20.0
Status affected
Version <= 9.21.25
Version 9.21.0
Status affected
Version <= 9.18.50-S1
Version 9.11.3-S1
Status affected
Version <= 9.20.27-S1
Version 9.20.9-S1
Status affected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.49% 0.409
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
ISC 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-197 Numeric Truncation Error

Truncation errors occur when a primitive is cast to a primitive of a smaller size and data is lost in the conversion.

Für Zugriff zu Vulnerability Intelligence ist ein VulnDex Zugang erforderlich.
VulnDex Intel
Media Report
21.09.2026 16:52
Für Zugriff zu Vulnerability Intelligence ist ein VulnDex Zugang erforderlich.
VulnDex Intel
Media Report
17.09.2026 15:48
https://downloads.isc.org/isc/bind9/9.20.29
https://kb.isc.org/docs/cve-2026-19667
https://downloads.isc.org/isc/bind9/9.21.26