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TI-2026-78787 Aliases CVE-2026-97313GHSA-9p2q-wv22-f9q8

Reachable assertion in BIND 9 RPZ handling causes server exit

Priority LOW 39CWE-617Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 17 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-617.

Summary

ISC 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 are affected. A reachable assertion (CWE-617) makes the server exit when it gets a recursive query followed by a non-recursive query. A remote unauthenticated attacker can crash servers that allow recursion and have two RPZ zones with different recursive-only settings.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00448 39th percentileScored 2026-11-07
Fix Partial Red Hat: 13 advisoriesRed Hat: 17 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ISCBIND 99.16.0 – 9.18.50; 9.20.0 – 9.20.29; 9.21.0 – 9.21.26; 9.11.3-S1 – 9.18.50-S1; 9.20.9-S1 – 9.20.29-S1—No fix listedCNA
  • BIND 9 VendorISC Affected 9.16.0 – 9.18.50; 9.20.0 – 9.20.29; 9.21.0 – 9.21.26; 9.11.3-S1 – 9.18.50-S1; 9.20.9-S1 – 9.20.29-S1 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*——ISC
  • cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* Versions — — ·ISC

Remediation

The sources list no fixed version for BIND 9. Red Hat fixes it in the advisories RHSA-2026:95346, RHSA-2026:95241, RHSA-2026:95242, RHSA-2026:95048, RHSA-2026:95017, RHSA-2026:94278, RHSA-2026:94277, RHSA-2026:94115, RHSA-2026:94011, RHSA-2026:93610, RHSA-2026:93072, RHSA-2026:92419, and RHSA-2026:87309. Red Hat's plan is none available for Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4, and Red Hat OpenShift Container Platform 5.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Red Hat 13 advisories

  • RHSA-2026:95346 Released 2026-11-06 · Red Hat rating Critical
    OpenShift Container Platform 4.22.22 bug fix and security update
    • Red Hat OpenShift Container Platform 4.22 rhcos-aarch64-4.22.9.8.202611032353-0, rhcos-ppc64le-4.22.9.8.202611032353-0, rhcos-s390x-4.22.9.8.202611032353-0 +1
  • RHSA-2026:95241 Released 2026-11-04 · Red Hat rating Important
    bind security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) bind-32:9.16.23-18.el9_4.13, bind-libs-32:9.16.23-18.el9_4.13
  • RHSA-2026:95242 Released 2026-11-04 · Red Hat rating Important
    bind security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) bind-32:9.16.23-11.el9_2.12, bind-dnssec-utils-32:9.16.23-11.el9_2.12, bind-libs-32:9.16.23-11.el9_2.12
Show 10 more Red Hat advisories
  • RHSA-2026:95048 Released 2026-11-04 · Red Hat rating Important
    bind security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) bind-libs-32:9.16.23-31.el9_6.5
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) bind-32:9.16.23-31.el9_6.5, bind-dnssec-utils-32:9.16.23-31.el9_6.5, bind-libs-32:9.16.23-31.el9_6.5 +1
  • RHSA-2026:95017 Released 2026-11-04 · Red Hat rating Important
    bind9.16 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) bind9.16-32:9.16.23-0.14.el8_8.10, bind9.16-dnssec-utils-32:9.16.23-0.14.el8_8.10, bind9.16-libs-32:9.16.23-0.14.el8_8.10 +1
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) bind9.16-32:9.16.23-0.14.el8_8.10, bind9.16-dnssec-utils-32:9.16.23-0.14.el8_8.10, bind9.16-libs-32:9.16.23-0.14.el8_8.10 +1
  • RHSA-2026:94278 Released 2026-11-03 · Red Hat rating Important
    bind9.18 security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) bind9.18-libs-32:9.18.29-4.el9_6.5
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) bind9.18-32:9.18.29-4.el9_6.5, bind9.18-dnssec-utils-32:9.18.29-4.el9_6.5, bind9.18-libs-32:9.18.29-4.el9_6.5
  • RHSA-2026:94277 Released 2026-11-03 · Red Hat rating Important
    bind9.16 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) bind9.16-32:9.16.23-0.7.el8_6.12, bind9.16-libs-32:9.16.23-0.7.el8_6.12
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) bind9.16-32:9.16.23-0.7.el8_6.12, bind9.16-libs-32:9.16.23-0.7.el8_6.12
  • RHSA-2026:94115 Released 2026-11-03 · Red Hat rating Important
    bind security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) bind-32:9.18.33-4.el10_0.6, bind-dnssec-utils-32:9.18.33-4.el10_0.6, bind-libs-32:9.18.33-4.el10_0.6
  • RHSA-2026:94011 Released 2026-11-02 · Red Hat rating Important
    bind9.16 security update
    • Red Hat Enterprise Linux AppStream (v. 8) bind9.16-32:9.16.23-0.22.el8_10.21, bind9.16-chroot-32:9.16.23-0.22.el8_10.21, bind9.16-dnssec-utils-32:9.16.23-0.22.el8_10.21 +4
    • Red Hat Enterprise Linux CRB (v. 8) bind9.16-devel-32:9.16.23-0.22.el8_10.21, bind9.16-doc-32:9.16.23-0.22.el8_10.21, bind9.16-libs-32:9.16.23-0.22.el8_10.21
  • RHSA-2026:93610 Released 2026-11-02 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux AppStream (v. 9) bind-32:9.16.23-40.el9_8.13, bind-chroot-32:9.16.23-40.el9_8.13, bind-dnssec-doc-32:9.16.23-40.el9_8.13 +5
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) bind-devel-32:9.16.23-40.el9_8.13, bind-doc-32:9.16.23-40.el9_8.13, bind-libs-32:9.16.23-40.el9_8.13
  • RHSA-2026:93072 Released 2026-10-30 · Red Hat rating Important
    bind9.18 security update
    • Red Hat Enterprise Linux AppStream (v. 9) bind9.18-32:9.18.29-14.el9_8.12, bind9.18-chroot-32:9.18.29-14.el9_8.12, bind9.18-dnssec-utils-32:9.18.29-14.el9_8.12 +2
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) bind9.18-devel-32:9.18.29-14.el9_8.12, bind9.18-doc-32:9.18.29-14.el9_8.12, bind9.18-libs-32:9.18.29-14.el9_8.12
  • RHSA-2026:92419 Released 2026-10-29 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux AppStream (v. 10) bind-32:9.18.33-15.el10_2.14, bind-chroot-32:9.18.33-15.el10_2.14, bind-dnssec-utils-32:9.18.33-15.el10_2.14 +3
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) bind-devel-32:9.18.33-15.el10_2.14, bind-doc-32:9.18.33-15.el10_2.14
  • RHSA-2026:87309 Released 2026-10-21 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images bind-32:9.20.30-0.1.hum1@aarch64, bind-32:9.20.30-0.1.hum1@s390x, bind-32:9.20.30-0.1.hum1@src +19

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat OpenShift Container Platform 4AffectedNo fix yet
Red Hat OpenShift Container Platform 5AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:94278, RHSA-2026:95048
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:92419
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:94011
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:93072, RHSA-2026:93610
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:94277
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:95017
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:95242
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:95241
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:94115
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:94278, RHSA-2026:95048
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)Fixed RHSA-2026:94277
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:95017
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:94011
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:92419
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:93072, RHSA-2026:93610
Red Hat Hardened ImagesFixed RHSA-2026:87309
Red Hat OpenShift Container Platform 4.22Fixed RHSA-2026:95346
Not affected: 14 products
  • Red Hat CodeReady Linux Builder EUS (v.9.6)
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • Red Hat Enterprise Linux AppStream E4S (v.8.8)
  • Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • Red Hat OpenShift AI (RHOAI)

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-97313
  2. 2026-10-21 Alias added: GHSA-9p2q-wv22-f9q8
  3. 2026-10-21 CISA SSVC decision points changed
  4. 2026-10-21 Priority changed: MEDIUM → LOW
  5. 2026-10-22 Fix available: RHSA-2026:87309 · Red Hat
  6. 2026-10-23 Fix available: Red Hat Hardened Images · Red Hat
  7. 2026-10-23 CVSS score added · Red Hat
  8. 2026-10-30 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · Red Hat
  9. 2026-10-30 Fix available: RHSA-2026:92419 · Red Hat
  10. 2026-10-31 Fix available: RHSA-2026:93072 · Red Hat
  11. 2026-10-31 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · Red Hat
  12. 2026-11-02 Affected versions changed · Red Hat
  13. 2026-11-03 Fix available: RHSA-2026:93610 · Red Hat
  14. 2026-11-03 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · Red Hat
  15. 2026-11-03 Fix available: RHSA-2026:94115 · Red Hat
  16. 2026-11-03 Fix available: RHSA-2026:94277 · Red Hat
  17. 2026-11-03 Fix available: RHSA-2026:94011 · Red Hat
  18. 2026-11-03 Fix available: RHSA-2026:94278 · Red Hat
  19. 2026-11-03 Fix available: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS (v. 10.0) +2 · Red Hat
  20. 2026-11-04 Fix available: RHSA-2026:95017 · Red Hat
  21. 2026-11-04 Fix available: RHSA-2026:95048 · Red Hat
  22. 2026-11-04 Fix available: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · Red Hat
  23. 2026-11-04 Fix available: RHSA-2026:95242 · Red Hat
  24. 2026-11-04 Fix available: RHSA-2026:95241 · Red Hat
  25. 2026-11-04 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream E4S (v.9.4) · Red Hat
  26. 2026-11-05 Affected versions changed · Red Hat
  27. 2026-11-06 Affected versions changed · Red Hat
  28. 2026-11-06 Affected versions changed · Red Hat
  29. 2026-11-07 Fix available: RHSA-2026:95346 · Red Hat
  30. 2026-11-07 Fix available: Red Hat OpenShift Container Platform 4.22 · Red Hat

References

Patch 2

Advisory 1

  • TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
  • TI-2023-27571 Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related… CVSS 3.1HIGH 7.5
  • TI-2021-07476 A second vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack CVSS 3.1CRITICAL 9.8
  • TI-1999-00042 Command execution via shell metachars in INN daemon (innd) 1.5 using "newgroup" and… CVSS 3.1CRITICAL 9.8
  • TI-2023-27773 The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance… CVSS 3.1HIGH 7.5
  • TI-2025-27240 Cache poisoning attacks with unsolicited RRs CVSS 3.1HIGH 8.6
See all 285 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences