CVE-2026-5950

5.3 Moyenne

Publiée le 20/05/2026 à 15:16 · Modifiée le 23/07/2026 à 14:10 · Analysée par le NVD · Source : security-officer@isc.org

Description

An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions. This issue affects BIND 9 versions 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.

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Produits concernés

Scores CVSS

Version	Score	Source	Vecteur
3.1	5.3 Moyenne	security-officer@isc.org	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`

Faiblesses (CWE)

CWE-606

Références

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-2026-5950 Vendor Advisory

CVE-2026-5950

Description

Produits concernés

Scores CVSS

Faiblesses (CWE)

Références

Ailleurs