It is possible for an attacker's zone to respond to a query with an RRSIG that has a smaller number of labels than the zone in which the RRSIG is contained. This causes `named` to produce a wildcard name for a zone that is shorter than the attacker's zone, which can result in cache poisoning. For this attack to have any effect, the resolver under attack must have set `synth-from-dnssec yes;` (which is the default). 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.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade bind | Jul 28, 2026 | Jul 22, 2026 |
| Amazon Linux Ami 2 | — | Upgrade bindUpgrade bind-licenseUpgrade bind-pkcs11Upgrade bind-debuginfoUpgrade bind-develUpgrade bind-pkcs11-utilsUpgrade bind-libsUpgrade bind-pkcs11-libsUpgrade bind-chrootUpgrade bind-libs-liteUpgrade bind-pkcs11-develUpgrade bind-lite-develUpgrade bind-export-develUpgrade bind-sdbUpgrade bind-export-libsUpgrade bind-sdb-chrootUpgrade bind-utils | Aug 5, 2026 | Aug 5, 2026 |
| Amazon_linux_2023 | — | Upgrade bind-chrootUpgrade bind-debuginfoUpgrade bind-libsUpgrade bind-utilsUpgrade bind-docUpgrade bindUpgrade bind-debugsourceUpgrade bind-libs-debuginfoUpgrade bind-dnssec-utilsUpgrade bind-licenseUpgrade bind-develUpgrade bind-dnssec-utils-debuginfoUpgrade bind-utils-debuginfo | Aug 10, 2026 | Jul 22, 2026 |
| Debian | — | Upgrade bind9 | Jul 28, 2026 | Jul 28, 2026 |
| Ibm Aix | — | Apply the fix or workaround for bind_advisory31 | Sep 16, 2026 | Sep 16, 2026 |
| Redhat Openshift | — | Upgrade rhcos | Aug 26, 2026 | Jul 22, 2026 |
| Redhat_linux | — | Upgrade bind-docUpgrade bind9.18-chrootUpgrade bind-pkcs11-develUpgrade bind-pkcs11-libs-debuginfoUpgrade bind9.18-libsUpgrade bind-pkcs11-utils-debuginfoUpgrade bind9.16-utilsUpgrade bind-utils-debuginfoUpgrade bind-lite-develUpgrade bind9.16-libsUpgrade bind9.16-docUpgrade bind-libs-lite-debuginfoUpgrade bind9.18-debuginfoUpgrade bindUpgrade bind-pkcs11-debuginfoUpgrade python3-bind9.16Upgrade bind-export-develUpgrade bind-debugsourceUpgrade bind9.16-dnssec-utilsUpgrade bind9.16-develUpgrade bind-dnssec-utils-debuginfoUpgrade bind-export-libsUpgrade bind-sdbUpgrade bind-dnssec-docUpgrade bind9.18-utilsUpgrade bind9.16-debugsourceUpgrade bind9.16-utils-debuginfoUpgrade bind-sdb-debuginfoUpgrade bind9.16-libs-debuginfoUpgrade bind9.18-dnssec-utilsUpgrade bind9.18-libs-debuginfoUpgrade bind-pkcs11-utilsNo solution existsUpgrade bind9.16Upgrade bind-export-libs-debuginfoUpgrade bind9.16-debuginfoUpgrade bind-pkcs11Upgrade bind-sdb-chrootUpgrade bind-licenseUpgrade bind9.16-chrootUpgrade python3-bindUpgrade bind-pkcs11-libsUpgrade bind-libs-liteUpgrade bind-libs-debuginfoUpgrade bind-utilsUpgrade bind9.18-dnssec-utils-debuginfoUpgrade bind-chrootUpgrade bind-dnssec-utilsUpgrade bind9.18-utils-debuginfoUpgrade bind-develUpgrade bind9.16-licenseUpgrade bind9.18-debugsourceUpgrade bind9.18Upgrade bind9.16-dnssec-utils-debuginfoUpgrade bind-debuginfoUpgrade bind-libsUpgrade bind9.18-docUpgrade bind9.18-devel | Jul 24, 2026 | Jul 22, 2026 |
| Rocky_linux | — | Upgrade bind-debugsourceUpgrade bind9.16-libsUpgrade bind9.16-develUpgrade bind-utils-debuginfoUpgrade bind-libs-liteUpgrade bind-export-libsUpgrade bindUpgrade bind-pkcs11-libs-debuginfoUpgrade bind-pkcs11Upgrade bind9.18-dnssec-utils-debuginfoUpgrade bind9.16-chrootUpgrade bind-pkcs11-utils-debuginfoUpgrade bind-pkcs11-utilsUpgrade bind-debuginfoUpgrade bind9.16-utils-debuginfoUpgrade bind9.18-debuginfoUpgrade bind-chrootUpgrade bind9.18-chrootUpgrade bind-export-develUpgrade bind9.18-libsUpgrade bind9.18-libs-debuginfoUpgrade bind-utilsUpgrade bind-sdbUpgrade bind-lite-develUpgrade bind-libs-lite-debuginfoUpgrade bind-libsUpgrade bind9.16-dnssec-utils-debuginfoUpgrade bind9.18-develUpgrade bind9.16-utilsUpgrade bind-dnssec-utils-debuginfoUpgrade bind9.16-dnssec-utilsUpgrade bind9.18Upgrade bind9.16Upgrade bind-pkcs11-debuginfoUpgrade bind9.16-libs-debuginfoUpgrade bind9.18-utils-debuginfoUpgrade bind-libs-debuginfoUpgrade bind-pkcs11-develUpgrade bind9.16-debugsourceUpgrade bind-develUpgrade bind-dnssec-utilsUpgrade bind9.18-dnssec-utilsUpgrade bind-sdb-debuginfoUpgrade bind9.16-debuginfoUpgrade bind-pkcs11-libsUpgrade bind9.18-utilsUpgrade bind9.18-debugsourceUpgrade bind-sdb-chrootUpgrade bind-export-libs-debuginfo | Aug 17, 2026 | Aug 15, 2026 |
| Ubuntu | — | Upgrade bind9 | Aug 19, 2026 | Aug 19, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 17, 2026 | Jul 22, 2026 |
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