CVE-2026-19667

HIGH

7.5

CVSS v3

Description

If an attacker-controlled authoritative server can produce a negative answer that is exactly 65536 bytes, then a flaw in `named` results in a negative cache entry of 0 bytes. When this entry is subsequently read, `named` aborts. 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.

CWE-197

How to fix

Remediation Available

bind9Debian

Fixed in:1:9.20.29-1~deb13u1CVE-2026-19667

Fixed in:1:9.20.29-1CVE-2026-19667

bindRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bindRocky

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-chrootRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-chrootRocky

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-debuginfoRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-debuginfoRocky

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-debugsourceRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-debugsourceRocky

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-develRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-develRocky

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-dnssec-docRocky

Fixed in:32:9.16.23-40.el9_8.10RHSA-2026:75767

bind-dnssec-docRed Hat / RHEL

Fixed in:32:9.16.23-40.el9_8.10RHSA-2026:75767

bind-dnssec-utilsRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.16.23-40.el9_8.10RHSA-2026:75767

bind-dnssec-utilsRocky

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.16.23-40.el9_8.10RHSA-2026:75767

bind-dnssec-utils-debuginfoRocky

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.16.23-40.el9_8.10RHSA-2026:75767

bind-dnssec-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.16.23-40.el9_8.10RHSA-2026:75767

bind-docRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.16.23-40.el9_8.10RHSA-2026:75767

bind-docRocky

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.16.23-40.el9_8.10RHSA-2026:75767

bind-export-develRocky

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-export-develRed Hat / RHEL

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-export-libsRed Hat / RHEL

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-export-libsRocky

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-export-libs-debuginfoRocky

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-export-libs-debuginfoRed Hat / RHEL

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-libsRocky

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-libsRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-libs-debuginfoRocky

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-libs-debuginfoRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.12RHSA-2026:75577

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

bind-libs-liteRocky

Fixed in:32:9.11.36-16.el8_10.16RHSA-2026:79162

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.57%probability of exploitation in 30 days

45thpercentile

Moderate risk: more likely to be exploited than 45% of all known CVEs.

References

Other references3

Related Vulnerabilities

Other CWE-197 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-42475	Critical	9.8	99%	KEV + Ransom	Fix
CVE-2025-6965	High	7.7	71%	-	Fix
CVE-2024-21310	High	7.8	12%	-	Fix
CVE-2024-43639	Critical	9.8	8.9%	-	Fix
CVE-2024-38125	High	7.8	5.9%	-	Fix
CVE-2024-28944	High	8.8	2.4%	-	Fix

Common questions

How do I fix CVE-2026-19667?

Published advisories record a fix for 115 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-19667 being actively exploited?

Not that we know of. CVE-2026-19667 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.57% is the estimated probability that it will be exploited in the next 30 days. That is higher than 45% of all scored CVEs.

How severe is CVE-2026-19667?

CVE-2026-19667 has a CVSS v3 base score of 7.5, rated important. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-19667 affect?

Published advisories record a fix for bind9 (Debian), bind (Red Hat / RHEL), bind (Rocky), bind-chroot (Red Hat / RHEL), and 111 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-19667

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-17.