CVE-2026-11331

MEDIUM

7.5

CVSS v3

Description

An attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names long enough to trigger a NAMETOOLONG error condition during RPZ processing. This is not handled correctly and may lead to defeating the RPZ rule. It also may lead to an unexpected exit of the BIND 9 software. This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.16.8-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

CWE-790

How to fix

Remediation Available

bind9Debian

Fixed in:1:9.18.49-1~deb12u2CVE-2026-11331

Fixed in:1:9.20.26-1~deb13u1CVE-2026-11331

Fixed in:1:9.20.26-1CVE-2026-11331

bindRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:main@x86_64RHSA-2026:54071

Fixed in:main@srcRHSA-2026:54071

Fixed in:main@aarch64RHSA-2026:54071

bindRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:main@srcRHSA-2026:54071

Fixed in:main@noarchRHSA-2026:54071

Fixed in:main@x86_64RHSA-2026:54071

bind-chrootRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-chrootRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-debuginfoRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

bind-debuginfoRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-debugsourceRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

bind-debugsourceRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

bind-develRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

bind-develRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

bind-dnssec-docRocky

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

bind-dnssec-docRed Hat / RHEL

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-dnssec-utilsRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

bind-dnssec-utilsRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

bind-dnssec-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-dnssec-utils-debuginfoRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-docRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-docRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

bind-libsRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

bind-libsRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-libs-debuginfoRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-libs-debuginfoRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

bind-licenseRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-licenseRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-utilsRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

bind-utilsRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

Fixed in:32:9.16.23-31.el9_6.4RHSA-2026:55441

bind-utils-debuginfoRocky

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-40.el9_8.8RHSA-2026:54510

bind-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.18.33-15.el10_2.10RHSA-2026:55437

Fixed in:32:9.16.23-18.el9_4.12RHSA-2026:57189

bind9.16Red Hat / RHEL

Fixed in:32:9.16.23-0.22.el8_10.12RHSA-2026:54509

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

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.43%probability of exploitation in 30 days

36thpercentile

Low risk: more likely to be exploited than 36% of all known CVEs.

References

Other references3

Related Vulnerabilities

Other CWE-790 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-43802	Critical	9.9	2.0%	-	Fix
CVE-2023-45239	Critical	9.8	1.8%	-	Fix
CVE-2024-31616	High	8.8	0.8%	-	-
CVE-2023-22578	Critical	10.0	0.8%	-	Fix
CVE-2024-47984	Medium	4.4	0.5%	-	-
CVE-2025-0431	Medium	5.8	0.4%	-	-

Common questions

How do I fix CVE-2026-11331?

Published advisories record a fix for 92 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-2026-11331 being actively exploited?

Not that we know of. CVE-2026-11331 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.43% is the estimated probability that it will be exploited in the next 30 days. That is higher than 36% of all scored CVEs.

How severe is CVE-2026-11331?

CVE-2026-11331 has a CVSS v3 base score of 7.5, rated moderate. 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-2026-11331 affect?

Published advisories record a fix for bind9 (Debian), bind (Rocky), bind (Red Hat / RHEL), bind-chroot (Red Hat / RHEL), and 88 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-2026-11331

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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 2026-07-22.