CVE-2026-11622

Potential memory usage beyond configured limits

En bref

Sévérité: HIGH 7.5
EPSS: EPSS 0.54 % · centile 45 (2026-10-27)
État: PUBLISHED
Publiée: 2026-07-22
Mise à jour: 2026-07-22
Attribuée par: isc
Statut NVD: Undergoing Analysis

Description

A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the limit configured in the `max-cache-size` parameter. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	isc
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · security-officer@isc.org (Secondary)

Faiblesses (CWE)

CWE-770

Références européennes

ENISA EUVD · EUVD-2026-47708
GCVE · GCVE-0-2026-11622

Avis du CERT-FR

CERTFR-2026-AVI-1376 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2026-AVI-1256 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2026-AVI-1206 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Produits affectés

Produit	Versions
ISC · BIND 9	affected 9.11.0 ≤ 9.18.50 ; affected 9.20.0 ≤ 9.20.24 ; affected 9.21.0 ≤ 9.21.23 ; affected 9.11.3-S1 ≤ 9.18.50-S1 ; affected 9.20.9-S1 ≤ 9.20.24-S1

Références

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD