CVE-2026-97313
published 2026-10-21CVE-2026-97313: A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure…
PriorityP346high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.45%
38.7th percentile
A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure, resulting in a denial of service. To be vulnerable, the BIND server must allow recursive queries and have at least two RPZ zones configured: one with the default setting of "recursive-only yes", and the other with "recursive-only no".
This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| isc | bind | — | — |
| isc | bind_9 | 9.11.3-S1 – 9.18.50-S1 | — |
| isc | bind_9 | 9.16.0 – 9.18.50 | — |
| isc | bind_9 | 9.20.0 – 9.20.29 | — |
| isc | bind_9 | 9.20.9-S1 – 9.20.29-S1 | — |
| isc | bind_9 | 9.21.0 – 9.21.26 | — |
| isc | dhcp | — | — |
| openshift | ose-rhel-coreos-8 | — | — |
| openshift | ose-rhel-coreos-9 | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_redhat7.5HIGH
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Red Hat
bind: bind: Denial of service via assertion failure in RPZ query processing
vendor_redhat·2026-10-21·CVSS 7.5
CVE-2026-97313 [HIGH] CWE-617 bind: bind: Denial of service via assertion failure in RPZ query processing
bind: bind: Denial of service via assertion failure in RPZ query processing
A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure, resulting in a denial of service. To be vulnerable, the BIND server must allow recursive queries and have at least two RPZ zones configured: one with the default setting of "recursive-only yes", and the other with "recursive-only no".
This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.
A flaw was found in BIND. A remote attacker can cause a denial of service (DoS) by sending a sequence of recursive and non-recursive queries to an affected server.
GHSA
A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure, resulting in a denial of service.
ghsa_unreviewed·2026-10-21
CVE-2026-97313 [HIGH] CWE-617 A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure, resulting in a denial of service.
A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure, resulting in a denial of service. To be vulnerable, the BIND server must allow recursive queries and have at least two RPZ zones configured: one with the default setting of "recursive-only yes", and the other with "recursive-only no".
This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-97313 dhcp: bind: Denial of service via assertion failure in RPZ query processing [fedora-all]
bugzilla·2026-10-21·CVSS 7.5
CVE-2026-97313 [HIGH] CVE-2026-97313 dhcp: bind: Denial of service via assertion failure in RPZ query processing [fedora-all]
CVE-2026-97313 dhcp: bind: Denial of service via assertion failure in RPZ query processing [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure, resulting in a denial of service. To be vulnerable, the BIND server must allow recursive queries and have at least two RPZ zones configured: one with the default setting of "recursive-only yes", and the other with "recursive-only no".
Bugzilla
CVE-2026-97313 bind: bind: Denial of service via assertion failure in RPZ query processing [fedora-all]
bugzilla·2026-10-21·CVSS 7.5
CVE-2026-97313 [HIGH] CVE-2026-97313 bind: bind: Denial of service via assertion failure in RPZ query processing [fedora-all]
CVE-2026-97313 bind: bind: Denial of service via assertion failure in RPZ query processing [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure, resulting in a denial of service. To be vulnerable, the BIND server must allow recursive queries and have at least two RPZ zones configured: one with the default setting of "recursive-only yes", and the other with "recursive-only no".
Bugzilla
CVE-2026-97313 bind: bind: Denial of service via assertion failure in RPZ query processing
bugzilla·2026-10-20·CVSS 7.5
CVE-2026-97313 [HIGH] CVE-2026-97313 bind: bind: Denial of service via assertion failure in RPZ query processing
CVE-2026-97313 bind: bind: Denial of service via assertion failure in RPZ query processing
A recursive BIND server that receives a query with recursion desired (RD=1) followed by a non-recursive query (RD=0) may exit with an assertion failure, resulting in a denial of service. To be vulnerable, the BIND server must allow recursive queries and have at least two RPZ zones configured: one with the default setting of "recursive-only yes", and the other with "recursive-only no".
2026-10-21
Published