High severity7.5NVD Advisory· Published Jul 22, 2026· Updated Jul 22, 2026
CVE-2026-13204
CVE-2026-13204
Description
If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof. 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.
Affected products
40- osv-coords38 versionspkg:rpm/almalinux/bindpkg:rpm/almalinux/bind-chrootpkg:rpm/almalinux/bind-develpkg:rpm/almalinux/bind-dnssec-docpkg:rpm/almalinux/bind-dnssec-utilspkg:rpm/almalinux/bind-docpkg:rpm/almalinux/bind-export-develpkg:rpm/almalinux/bind-export-libspkg:rpm/almalinux/bind-libspkg:rpm/almalinux/bind-libs-litepkg:rpm/almalinux/bind-licensepkg:rpm/almalinux/bind-lite-develpkg:rpm/almalinux/bind-pkcs11pkg:rpm/almalinux/bind-pkcs11-develpkg:rpm/almalinux/bind-pkcs11-libspkg:rpm/almalinux/bind-pkcs11-utilspkg:rpm/almalinux/bind-sdbpkg:rpm/almalinux/bind-sdb-chrootpkg:rpm/almalinux/bind-utilspkg:rpm/almalinux/bind9.16pkg:rpm/almalinux/bind9.16-chrootpkg:rpm/almalinux/bind9.16-develpkg:rpm/almalinux/bind9.16-dnssec-utilspkg:rpm/almalinux/bind9.16-docpkg:rpm/almalinux/bind9.16-libspkg:rpm/almalinux/bind9.16-licensepkg:rpm/almalinux/bind9.16-utilspkg:rpm/almalinux/bind9.18pkg:rpm/almalinux/bind9.18-chrootpkg:rpm/almalinux/bind9.18-develpkg:rpm/almalinux/bind9.18-dnssec-utilspkg:rpm/almalinux/bind9.18-docpkg:rpm/almalinux/bind9.18-libspkg:rpm/almalinux/bind9.18-utilspkg:rpm/almalinux/python3-bindpkg:rpm/almalinux/python3-bind9.16pkg:rpm/opensuse/bind&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/bind&distro=openSUSE%20Tumbleweed
< 32:9.16.23-40.el9_8.8+ 37 more
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.11.36-16.el8_10.14
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.18.29-14.el9_8.8
- (no CPE)range: < 32:9.16.23-40.el9_8.8
- (no CPE)range: < 32:9.16.23-0.22.el8_10.12
- (no CPE)range: < 9.20.26-160000.1.1
- (no CPE)range: < 9.20.26-1.1
Patches
Vulnerability mechanics
References
3News mentions
1- ISC BIND 9: Nine DNSSEC and Response Handling Flaws Disclosed TogetherVypr Intelligence · Jul 23, 2026