Back Linuxsecurity Ubuntu 25.10 Bind High Denial of Service Issues USN-8124
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in Bind. Software Description: - bind9: Internet Domain Name Server Details: Samy Medjahed discovered that Bind incorrectly handled insecure delegation validation. A remote attacker could possibly use this issue to cause excessive NSEC3 iterations, consuming CPU resources, and leading to a denial of service. (CVE-2026-1519) Vitaly Simonovich discovered that Bind incorrectly handled memory when preparing DNSSEC proofs of non-existence. A remote attacker could possibly use this issue to cause memory consumption, leading to a denial of service. This issue only affected Ubuntu 25.10. (CVE-2026-3104) Vitaly Simonovich discovered that Bind incorrectly handled authenticated queries containing TKEY records. A remote attacker could possibly use this
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in Bind. Software Description: - bind9: Internet Domain Name Server Details: Samy Medjahed discovered that Bind incorrectly handled insecure delegation validation. A remote attacker could possibly use this issue to cause excessive NSEC3 iterations, consuming CPU resources, and leading to a denial of service. (CVE-2026-1519) Vitaly Simonovich discovered that Bind incorrectly handled memory when preparing DNSSEC proofs of non-existence. A remote attacker could possibly use this issue to cause memory consumption, leading to a denial of service. This issue only affected Ubuntu 25.10. (CVE-2026-3104) Vitaly Simonovich discovered that Bind incorrectly handled authenticated queries containing TKEY records. A remote attacker could possibly use this
The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 bind9 1:9.20.11-1ubuntu2.2 Ubuntu 24.04 LTS bind9 1:9.18.39-0ubuntu0.24.04.3 Ubuntu 22.04 LTS bind9 1:9.18.39-0ubuntu0.22.04.3 In general, a standard system update will make all the necessary changes.
The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 bind9 1:9.20.11-1ubuntu2.2 Ubuntu 24.04 LTS bind9 1:9.18.39-0ubuntu0.24.04.3 Ubuntu 22.04 LTS bind9 1:9.18.39-0ubuntu0.22.04.3 In general, a standard system update will make all the necessary changes.
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