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CVE-2026-5947 Undefined behavior may result due to a race condition leading to a use-after-free violation

Description

Undefined behavior may result due to a race condition leading to a use-after-free violation. If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature. If, during that validation, the "recursive-clients" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.

Produits et versions touchés

Produit Versions touchées Corrigé en
BIND 9 9.21 9.21.0 → 9.21.21 Pas de correctif indiqué
BIND 9 9.20 9.20.0 → 9.20.22 Pas de correctif indiqué
BIND 9 9.18 premières → < 9.18.28 9.18.28
Red Hat Hardened Images 9.18 premières → < 9.18.48-1.1.hum1 9.18.48-1.1.hum1
Red Hat Enterprise Linux 10 Versions non publiées
Red Hat Enterprise Linux 6 Versions non publiées
Red Hat Enterprise Linux 7 Versions non publiées
Red Hat Enterprise Linux 8 Versions non publiées
Red Hat Enterprise Linux 9 Versions non publiées
Afficher l’autre branche
Produit Versions touchées Corrigé en
Red Hat OpenShift Container Platform 4 Versions non publiées

Références

Chronologie

  1. Publiée
  2. Dernière modification

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