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TI-2026-11212 Aliases CVE-2026-13204GHSA-89q8-qc36-7m58

Unexpected exit in certain situations with NSEC and NSEC3 both present

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: 30 fixed, 2 without a fix

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

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00523 44th percentileScored 2026-11-07
Fix Partial Red Hat: 20 advisoriesRed Hat: 30 fixed, 2 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 99.11.0 – 9.18.50; 9.20.0 – 9.20.24; 9.21.0 – 9.21.23; 9.11.3-S1 – 9.18.50-S1; 9.20.9-S1 – 9.20.24-S1—No fix listedCNA
  • BIND 9 VendorISC Affected 9.11.0 – 9.18.50; 9.20.0 – 9.20.24; 9.21.0 – 9.21.23; 9.11.3-S1 – 9.18.50-S1; 9.20.9-S1 – 9.20.24-S1 Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*9.11.0 – 9.18.50VulnerableISC
cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:*9.11.3 – 9.18.50VulnerableISC
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*9.20.0 – 9.20.24VulnerableISC
cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:*9.20.9 – 9.20.24VulnerableISC
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*9.21.0 – 9.21.23VulnerableISC
  • cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* Versions 9.11.0 – 9.18.50 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:* Versions 9.11.3 – 9.18.50 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* Versions 9.20.0 – 9.20.24 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:* Versions 9.20.9 – 9.20.24 Vulnerable ·ISC
  • cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* Versions 9.21.0 – 9.21.23 Vulnerable ·ISC

Remediation

Red Hat 20 advisories

  • RHSA-2026:95727 Released 2026-11-06 · Red Hat rating Important
    bind security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION) bind-32:9.8.2-0.68.rc1.el6_10.20, bind-libs-32:9.8.2-0.68.rc1.el6_10.20
    • Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION) bind-sdb-32:9.8.2-0.68.rc1.el6_10.20
  • RHSA-2026:95477 Released 2026-11-05 · Red Hat rating Important
    bind security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) bind-32:9.11.26-4.el8_4.10, bind-libs-32:9.11.26-4.el8_4.10, bind-libs-lite-32:9.11.26-4.el8_4.10 +5
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) bind-32:9.11.26-4.el8_4.10, bind-libs-32:9.11.26-4.el8_4.10, bind-libs-lite-32:9.11.26-4.el8_4.10 +5
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bind-32:9.11.26-4.el8_4.10, bind-export-libs-32:9.11.26-4.el8_4.10
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bind-32:9.11.26-4.el8_4.10, bind-export-libs-32:9.11.26-4.el8_4.10
  • RHSA-2026:95478 Released 2026-11-05 · Red Hat rating Important
    bind security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) bind-32:9.11.36-8.el8_8.11, bind-libs-lite-32:9.11.36-8.el8_8.11, bind-pkcs11-32:9.11.36-8.el8_8.11 +4
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) bind-32:9.11.36-8.el8_8.11, bind-libs-lite-32:9.11.36-8.el8_8.11, bind-pkcs11-32:9.11.36-8.el8_8.11 +4
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bind-32:9.11.36-8.el8_8.11, bind-export-libs-32:9.11.36-8.el8_8.11
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bind-32:9.11.36-8.el8_8.11, bind-export-libs-32:9.11.36-8.el8_8.11
Show 17 more Red Hat advisories
  • RHSA-2026:95435 Released 2026-11-05 · Red Hat rating Important
    bind security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) bind-32:9.11.36-3.el8_6.13, bind-chroot-32:9.11.36-3.el8_6.13, bind-devel-32:9.11.36-3.el8_6.13 +12
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) bind-32:9.11.36-3.el8_6.13, bind-chroot-32:9.11.36-3.el8_6.13, bind-devel-32:9.11.36-3.el8_6.13 +12
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bind-32:9.11.36-3.el8_6.13, bind-export-devel-32:9.11.36-3.el8_6.13, bind-export-libs-32:9.11.36-3.el8_6.13
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bind-32:9.11.36-3.el8_6.13, bind-export-devel-32:9.11.36-3.el8_6.13, bind-export-libs-32:9.11.36-3.el8_6.13
  • 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
  • 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-2026:94115 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-2026:80501 Released 2026-10-12 · 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_6.11, bind9.16-libs-32:9.16.23-0.7.el8_6.11
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) bind9.16-32:9.16.23-0.7.el8_6.11, bind9.16-libs-32:9.16.23-0.7.el8_6.11
  • RHSA-2026:79160 Released 2026-10-08 · 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_8.9, bind9.16-dnssec-utils-32:9.16.23-0.14.el8_8.9, bind9.16-libs-32:9.16.23-0.14.el8_8.9
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) bind9.16-32:9.16.23-0.14.el8_8.9, bind9.16-dnssec-utils-32:9.16.23-0.14.el8_8.9, bind9.16-libs-32:9.16.23-0.14.el8_8.9
  • RHSA-2026:66357 Released 2026-09-15 · Red Hat rating Important
    OpenShift Container Platform 4.22.14 bug fix and security update
    • Red Hat OpenShift Container Platform 4.22 rhcos-aarch64-4.22.9.8.202609081748-0, rhcos-ppc64le-4.22.9.8.202609081748-0, rhcos-s390x-4.22.9.8.202609081748-0 +1
  • RHSA-2026:60383 Released 2026-08-26 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) bind-32:9.11.4-26.P2.el7_9.21, bind-export-libs-32:9.11.4-26.P2.el7_9.21, bind-export-libs-32:9.11.4-26.P2.el7_9.21.ppc +6
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) bind-sdb-32:9.11.4-26.P2.el7_9.21
  • RHSA-2026:57362 Released 2026-08-25 · Red Hat rating Important
    OpenShift Container Platform 4.22.11 bug fix and security update
    • Red Hat OpenShift Container Platform 4.22 rhcos-aarch64-4.22.9.8.202608191915-0, rhcos-ppc64le-4.22.9.8.202608191915-0, rhcos-s390x-4.22.9.8.202608191915-0 +1
  • RHSA-2026:57189 Released 2026-08-19 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) bind-32:9.16.23-18.el9_4.12, bind-chroot-32:9.16.23-18.el9_4.12, bind-dnssec-doc-32:9.16.23-18.el9_4.12 +5
  • RHSA-2026:55442 Released 2026-08-17 · Red Hat rating Important
    bind9.18 security update
    • Red Hat Enterprise Linux AppStream (v. 9) bind9.18-32:9.18.29-14.el9_8.8, bind9.18-chroot-32:9.18.29-14.el9_8.8, bind9.18-dnssec-utils-32:9.18.29-14.el9_8.8 +2
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) bind9.18-devel-32:9.18.29-14.el9_8.8, bind9.18-doc-32:9.18.29-14.el9_8.8, bind9.18-libs-32:9.18.29-14.el9_8.8
  • RHSA-2026:55437 Released 2026-08-17 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux AppStream (v. 10) bind-32:9.18.33-15.el10_2.10, bind-chroot-32:9.18.33-15.el10_2.10, bind-dnssec-utils-32:9.18.33-15.el10_2.10 +3
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) bind-devel-32:9.18.33-15.el10_2.10, bind-doc-32:9.18.33-15.el10_2.10
  • RHSA-2026:55441 Released 2026-08-17 · Red Hat rating Important
    bind security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) bind-libs-32:9.16.23-31.el9_6.4
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) bind-32:9.16.23-31.el9_6.4, bind-dnssec-utils-32:9.16.23-31.el9_6.4, bind-libs-32:9.16.23-31.el9_6.4 +1
  • RHSA-2026:54654 Released 2026-08-13 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux AppStream (v. 8) bind-32:9.11.36-16.el8_10.14, bind-chroot-32:9.11.36-16.el8_10.14, bind-devel-32:9.11.36-16.el8_10.14 +12
    • Red Hat Enterprise Linux BaseOS (v. 8) bind-32:9.11.36-16.el8_10.14, bind-export-devel-32:9.11.36-16.el8_10.14, bind-export-libs-32:9.11.36-16.el8_10.14
  • RHSA-2026:54510 Released 2026-08-13 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux AppStream (v. 9) bind-32:9.16.23-40.el9_8.8, bind-chroot-32:9.16.23-40.el9_8.8, bind-dnssec-doc-32:9.16.23-40.el9_8.8 +5
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) bind-devel-32:9.16.23-40.el9_8.8, bind-doc-32:9.16.23-40.el9_8.8, bind-libs-32:9.16.23-40.el9_8.8
  • RHSA-2026:54509 Released 2026-08-13 · Red Hat rating Important
    bind9.16 security update
    • Red Hat Enterprise Linux AppStream (v. 8) bind9.16-32:9.16.23-0.22.el8_10.12, bind9.16-chroot-32:9.16.23-0.22.el8_10.12, bind9.16-dnssec-utils-32:9.16.23-0.22.el8_10.12 +4
    • Red Hat Enterprise Linux CRB (v. 8) bind9.16-devel-32:9.16.23-0.22.el8_10.12, bind9.16-doc-32:9.16.23-0.22.el8_10.12, bind9.16-libs-32:9.16.23-0.22.el8_10.12
  • RHSA-2026:54071 Released 2026-08-12 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images bind-32:9.20.26-0.1.hum1@aarch64, bind-32:9.20.26-0.1.hum1@src, bind-32:9.20.26-0.1.hum1@x86_64 +12

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
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-2026:55441, RHSA-2026:94278
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:55437
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:54509, RHSA-2026:54654
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:54510, RHSA-2026:55442
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2026:95477
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:80501, RHSA-2026:95435
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:79160, RHSA-2026:95478
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:95242
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:57189
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:94115
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:55441, RHSA-2026:94278
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2026:95477
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)Fixed RHSA-2026:80501, RHSA-2026:95435
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:79160, RHSA-2026:95478
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:54654
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:95477
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:95435
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:95478
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:95477
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:95435
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:95478
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:54509
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:55437
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:54510, RHSA-2026:55442
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:60383
Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)Fixed RHSA-2026:95727
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2026:60383
Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)Fixed RHSA-2026:95727
Red Hat Hardened ImagesFixed RHSA-2026:54071
Red Hat OpenShift Container Platform 4.22Fixed RHSA-2026:57362, RHSA-2026:66357
Not affected: 20 products
  • Red Hat CodeReady Linux Builder EUS (v.9.6)
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • 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 EUS (v. 10.0)
  • Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • Red Hat Enterprise Linux AppStream TUS (v.8.8)
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
  • Red Hat Enterprise Linux Server (v. 7 ELS)
  • Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-13204
  2. 2026-10-03 Alias added: GHSA-89q8-qc36-7m58
  3. 2026-10-09 Fix available: RHSA-2026:79160 · Red Hat
  4. 2026-10-09 Fix available: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · Red Hat
  5. 2026-10-12 Fix available: RHSA-2026:80501 · Red Hat
  6. 2026-10-12 Fix available: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) · Red Hat
  7. 2026-10-30 Affected versions changed · Red Hat
  8. 2026-11-03 Fix available: RHSA-2026:94115 · Red Hat
  9. 2026-11-03 Fix available: RHSA-2026:94278 · Red Hat
  10. 2026-11-03 Fix available: Red Hat Enterprise Linux AppStream EUS (v. 10.0) · Red Hat
  11. 2026-11-04 Fix available: RHSA-2026:95242 · Red Hat
  12. 2026-11-04 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2) · Red Hat
  13. 2026-11-05 Fix available: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4), Red Hat Enterprise Linux BaseOS AUS (v.8.4) +5 · Red Hat
  14. 2026-11-06 Fix available: RHSA-2026:95477 · Red Hat
  15. 2026-11-06 Fix available: RHSA-2026:95435 · Red Hat
  16. 2026-11-06 Fix available: RHSA-2026:95478 · Red Hat
  17. 2026-11-06 Fix available: Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION), Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION) · Red Hat
  18. 2026-11-06 Fix available: RHSA-2026:95727 · 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-2023-27773 The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance… CVSS 3.1HIGH 7.5
  • TI-2020-06910 A logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.c CVSS 3.1HIGH 7.5
  • TI-2016-02320 buffer.c in named in ISC BIND 9 before 9.9.9-P3, 9.10.x before 9.10.4-P3, and 9.11.x… CVSS 3.0HIGH 7.5
See all 192 →

Sources

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