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TI-2026-55474 Aliases CVE-2026-80274GHSA-m66j-g9q7-jxjg

Validating resolver can abort while caching a mismatched NOQNAME proof

Priority MEDIUM 40CWE-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: 28 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 BIND resolver sends a query for a DNSSEC-signed authoritative zone, and the authoritative server replies with a valid wildcard answer and signed NSEC3 proof, followed by an unsigned NSEC at the same owner name, it will trigger an unexpected program exit. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00569 47th percentileScored 2026-11-07
Fix Partial Red Hat: 18 advisoriesRed Hat: 28 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 – 9.20.27; 9.21.0 – 9.21.25; 9.11.3-S1 – 9.18.50-S1; 9.20.9-S1 – 9.20.27-S1—No fix listedCNA
  • BIND 9 VendorISC Affected 9.11.0 – 9.18.50; 9.20.0 – 9.20.27; 9.21.0 – 9.21.25; 9.11.3-S1 – 9.18.50-S1; 9.20.9-S1 – 9.20.27-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

Red Hat 18 advisories

  • RHSA-2026:95726 Released 2026-11-06 · Red Hat rating Important
    bind security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Server (v. 7 ELS) bind-32:9.11.4-26.P2.el7_9.22, bind-export-libs-32:9.11.4-26.P2.el7_9.22, bind-export-libs-32:9.11.4-26.P2.el7_9.22.ppc +7
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) bind-sdb-32:9.11.4-26.P2.el7_9.22
  • 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 15 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-2026:95241 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
  • 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-2026:89197 Released 2026-10-27 · Red Hat rating Critical
    OpenShift Container Platform 4.22.20 bug fix and security update
    • Red Hat OpenShift Container Platform 4.22 rhcos-aarch64-4.22.9.8.202610241758-0, rhcos-ppc64le-4.22.9.8.202610241758-0, rhcos-s390x-4.22.9.8.202610241758-0 +1
  • RHSA-2026:79162 Released 2026-10-08 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux AppStream (v. 8) bind-32:9.11.36-16.el8_10.16, bind-chroot-32:9.11.36-16.el8_10.16, bind-devel-32:9.11.36-16.el8_10.16 +12
    • Red Hat Enterprise Linux BaseOS (v. 8) bind-32:9.11.36-16.el8_10.16, bind-export-devel-32:9.11.36-16.el8_10.16, bind-export-libs-32:9.11.36-16.el8_10.16
  • RHSA-2026:79113 Released 2026-10-08 · Red Hat rating Important
    bind9.16 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) bind9.16-32:9.16.23-0.22.el8_10.16, bind9.16-chroot-32:9.16.23-0.22.el8_10.16, bind9.16-dnssec-utils-32:9.16.23-0.22.el8_10.16 +4
    • Red Hat Enterprise Linux CRB (v. 8) bind9.16-devel-32:9.16.23-0.22.el8_10.16, bind9.16-doc-32:9.16.23-0.22.el8_10.16, bind9.16-libs-32:9.16.23-0.22.el8_10.16
  • RHSA-2026:75767 Released 2026-10-05 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux AppStream (v. 9) bind-32:9.16.23-40.el9_8.10, bind-chroot-32:9.16.23-40.el9_8.10, bind-dnssec-doc-32:9.16.23-40.el9_8.10 +5
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) bind-devel-32:9.16.23-40.el9_8.10, bind-doc-32:9.16.23-40.el9_8.10, bind-libs-32:9.16.23-40.el9_8.10
  • RHSA-2026:75578 Released 2026-10-05 · Red Hat rating Important
    bind9.18 security update
    • Red Hat Enterprise Linux AppStream (v. 9) bind9.18-32:9.18.29-14.el9_8.10, bind9.18-chroot-32:9.18.29-14.el9_8.10, bind9.18-dnssec-utils-32:9.18.29-14.el9_8.10 +2
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) bind9.18-devel-32:9.18.29-14.el9_8.10, bind9.18-doc-32:9.18.29-14.el9_8.10, bind9.18-libs-32:9.18.29-14.el9_8.10
  • RHSA-2026:75577 Released 2026-10-05 · Red Hat rating Important
    bind security update
    • Red Hat Enterprise Linux AppStream (v. 10) bind-32:9.18.33-15.el10_2.12, bind-chroot-32:9.18.33-15.el10_2.12, bind-dnssec-utils-32:9.18.33-15.el10_2.12 +3
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) bind-devel-32:9.18.33-15.el10_2.12, bind-doc-32:9.18.33-15.el10_2.12
  • RHSA-2026:68279 Released 2026-09-16 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images bind-32:9.20.29-0.1.hum1@aarch64, bind-32:9.20.29-0.1.hum1@src, bind-32:9.20.29-0.1.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-2026:94278, RHSA-2026:95048
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:75577
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:79113, RHSA-2026:79162
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:75578, RHSA-2026:75767
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2026:95477
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:94277, RHSA-2026:95435
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:95017, 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-2026:95241
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.8.4)Fixed RHSA-2026:95477
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)Fixed RHSA-2026:94277, RHSA-2026:95435
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:95017, RHSA-2026:95478
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:79162
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-2026:79113
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:75577
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:75578, RHSA-2026:75767
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:95726
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2026:95726
Red Hat Hardened ImagesFixed RHSA-2026:68279
Red Hat OpenShift Container Platform 4.22Fixed RHSA-2026:89197
Not affected: 20 products
  • Red Hat CodeReady Linux Builder EUS (v.9.6)
  • Red Hat Enterprise Linux 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 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.8.4)
  • 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 Optional (v. 7 ELS)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-80274
  2. 2026-10-03 Alias added: GHSA-m66j-g9q7-jxjg
  3. 2026-10-05 Fix available: RHSA-2026:75577 · Red Hat
  4. 2026-10-05 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · Red Hat
  5. 2026-10-06 Fix available: RHSA-2026:75578 · Red Hat
  6. 2026-10-06 Fix available: RHSA-2026:75767 · Red Hat
  7. 2026-10-06 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · Red Hat
  8. 2026-10-09 Fix available: RHSA-2026:79113 · Red Hat
  9. 2026-10-09 Fix available: RHSA-2026:79162 · Red Hat
  10. 2026-10-09 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · Red Hat
  11. 2026-10-28 Fix available: Red Hat OpenShift Container Platform 4.22 · Red Hat
  12. 2026-10-29 Fix available: RHSA-2026:89197 · Red Hat
  13. 2026-10-30 Affected versions changed · Red Hat
  14. 2026-11-03 Fix available: RHSA-2026:94115 · Red Hat
  15. 2026-11-03 Fix available: RHSA-2026:94277 · Red Hat
  16. 2026-11-03 Fix available: RHSA-2026:94278 · Red Hat
  17. 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
  18. 2026-11-04 Fix available: RHSA-2026:95017 · Red Hat
  19. 2026-11-04 Fix available: RHSA-2026:95048 · Red Hat
  20. 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
  21. 2026-11-04 Fix available: RHSA-2026:95242 · Red Hat
  22. 2026-11-04 Fix available: RHSA-2026:95241 · Red Hat
  23. 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
  24. 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
  25. 2026-11-06 Fix available: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS) · Red Hat
  26. 2026-11-06 Fix available: RHSA-2026:95477 · Red Hat
  27. 2026-11-06 Fix available: RHSA-2026:95435 · Red Hat
  28. 2026-11-06 Fix available: RHSA-2026:95478 · Red Hat
  29. 2026-11-06 Fix available: RHSA-2026:95726 · 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