CVE-2022-3924

HIGHEPSS 97th pctl

7.5

CVSS v3

Description

This issue can affect BIND 9 resolvers with `stale-answer-enable yes;` that also make use of the option `stale-answer-client-timeout`, configured with a value greater than zero. If the resolver receives many queries that require recursion, there will be a corresponding increase in the number of clients that are waiting for recursion to complete. If there are sufficient clients already waiting when a new client query is received so that it is necessary to SERVFAIL the longest waiting client (see BIND 9 ARM `recursive-clients` limit and soft quota), then it is possible for a race to occur between providing a stale answer to this older client and sending an early timeout SERVFAIL, which may cause an assertion failure. This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1.

CWE-617

How to fix

Remediation Available

bind9Debian

Fixed in:1:9.16.37-1~deb11u1CVE-2022-3924

Fixed in:1:9.18.11-1CVE-2022-3924

bindRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bindRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-chrootRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-chrootRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-debuginfoRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-debugsourceRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-debugsourceRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-develRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-develRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-dnssec-docRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-dnssec-docRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-dnssec-utilsRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-dnssec-utilsRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-dnssec-utils-debuginfoRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-dnssec-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-docRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-docRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-libsRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-libsRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-libs-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-libs-debuginfoRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-licenseRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-licenseRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-utilsRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-utilsRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-utils-debuginfoRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

bind9.16Red Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16Rocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-chrootRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-chrootRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-debuginfoRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-debugsourceRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-debugsourceRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-develRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-develRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-dnssec-utilsRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-dnssec-utilsRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-dnssec-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-dnssec-utils-debuginfoRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-docRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-docRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-libsRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-libsRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-libs-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-libs-debuginfoRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-licenseRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-licenseRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-utilsRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-utilsRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9.16-utils-debuginfoRocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

python3-bindRocky

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

python3-bindRed Hat / RHEL

Fixed in:32:9.16.23-11.el9RHSA-2023:2261

python3-bind9.16Rocky

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

python3-bind9.16Red Hat / RHEL

Fixed in:32:9.16.23-0.14.el8RHSA-2023:2792

bind9Ubuntu

Fixed in:1:9.16.1-0ubuntu2.12USN-5827-1

Fixed in:1:9.18.1-1ubuntu1.3USN-5827-1

Fixed in:1:9.18.4-2ubuntu2.1USN-5827-1

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

16.11%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

Vendor Advisory1

kb.isc.org

Related Vulnerabilities

Other CWE-617 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-8617	High	7.5	93%	-	Fix
CVE-2020-36222	High	7.5	78%	-	Fix
CVE-2006-5779	High	7.5	76%	-	Fix
CVE-2021-27212	High	7.5	64%	-	Fix
CVE-2018-5740	High	7.5	60%	-	Fix
CVE-2023-28425	Medium	5.5	55%	-	Fix

Common questions

How do I fix CVE-2022-3924?

Published advisories record a fix for 60 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-2022-3924 being actively exploited?

Not that we know of. CVE-2022-3924 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 16.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 97% of all scored CVEs.

How severe is CVE-2022-3924?

CVE-2022-3924 has a CVSS v3 base score of 7.5, rated high. 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-2022-3924 affect?

Published advisories record a fix for bind9 (Debian), bind (Red Hat / RHEL), bind (Rocky), bind-chroot (Red Hat / RHEL), and 56 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-2022-3924

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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 2025-03-31.