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TI-2026-15965 Aliases CVE-2026-19662GHSA-pqfm-7x4v-9w63

qpcache NOQNAME proof use-after-free crashes recursive resolver

Priority LOW 27CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 8 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

An attacker may be able to cause a `named` resolver to abort. The attack requires inducing the victim resolver to send multiple queries for a DNSSEC-signed zone hosted by an authoritative server under the control of the attacker. If the auth responds with a particular sequence of crafted answers, and those answers arrive in a particular order with particular timing, the `named` resolver will encounter a use-after-free bug, and abort. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 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 0.00464 40th percentileScored 2026-11-07
Fix Partial Red Hat: 6 advisoriesRed Hat: 8 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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; 9.11.3-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; 9.11.3-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 6 advisories

  • 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-2026:93925 Released 2026-11-02 · Red Hat rating Important
    bind security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) bind-32:9.11.36-18.el8_10, bind-chroot-32:9.11.36-18.el8_10, bind-devel-32:9.11.36-18.el8_10 +12
    • Red Hat Enterprise Linux BaseOS (v. 8) bind-32:9.11.36-18.el8_10, bind-export-devel-32:9.11.36-18.el8_10, bind-export-libs-32:9.11.36-18.el8_10
  • RHSA-2026:90328 Released 2026-10-26 · Red Hat rating Moderate
    bind security update
    • Red Hat Enterprise Linux AppStream (v. 10) bind-32:9.18.33-15.el10_2.13, bind-chroot-32:9.18.33-15.el10_2.13, bind-dnssec-utils-32:9.18.33-15.el10_2.13 +3
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) bind-devel-32:9.18.33-15.el10_2.13, bind-doc-32:9.18.33-15.el10_2.13
Show 3 more Red Hat advisories
  • RHSA-2026:89746 Released 2026-10-26 · Red Hat rating Moderate
    bind9.18 security update
    • Red Hat Enterprise Linux AppStream (v. 9) bind9.18-32:9.18.29-14.el9_8.11, bind9.18-chroot-32:9.18.29-14.el9_8.11, bind9.18-dnssec-utils-32:9.18.29-14.el9_8.11 +2
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) bind9.18-devel-32:9.18.29-14.el9_8.11, bind9.18-doc-32:9.18.29-14.el9_8.11, bind9.18-libs-32:9.18.29-14.el9_8.11
  • RHSA-2026:89745 Released 2026-10-26 · Red Hat rating Moderate
    bind security update
    • Red Hat Enterprise Linux AppStream (v. 9) bind-32:9.16.23-40.el9_8.12, bind-chroot-32:9.16.23-40.el9_8.12, bind-dnssec-doc-32:9.16.23-40.el9_8.12 +5
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) bind-devel-32:9.16.23-40.el9_8.12, bind-doc-32:9.16.23-40.el9_8.12, bind-libs-32:9.16.23-40.el9_8.12
  • 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: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 5AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:90328
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:93925, RHSA-2026:94011
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:89745, RHSA-2026:89746
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:93925
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:94011
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:90328
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:89745, RHSA-2026:89746
Red Hat Hardened ImagesFixed RHSA-2026:68279
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift AI (RHOAI)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19662
  2. 2026-10-03 Alias added: GHSA-pqfm-7x4v-9w63
  3. 2026-10-16 Affected versions changed · Red Hat
  4. 2026-10-26 Fix available: RHSA-2026:89746 · Red Hat
  5. 2026-10-26 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · Red Hat
  6. 2026-10-26 Fix available: RHSA-2026:89745 · Red Hat
  7. 2026-10-26 Affected versions changed · Red Hat
  8. 2026-10-27 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · Red Hat
  9. 2026-10-29 Fix available: RHSA-2026:90328 · Red Hat
  10. 2026-10-30 Affected versions changed · Red Hat
  11. 2026-11-03 Fix available: RHSA-2026:93925 · Red Hat
  12. 2026-11-03 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux BaseOS (v. 8) · Red Hat
  13. 2026-11-03 Fix available: RHSA-2026:94011 · Red Hat
  14. 2026-11-03 Fix available: Red Hat Enterprise Linux CRB (v. 8) · Red Hat
  15. 2026-11-06 Affected versions changed · Red Hat

References

Patch 1

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