Is CVE-2023-28366 in the CISA KEV catalog?

No. CVE-2023-28366 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-28366?

CVE-2023-28366 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2023-28366?

CVE-2023-28366 has an EPSS score of 1.11% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-28366?

Upgrade mosquitto on debian 11 to 2.0.11-1+deb11u1 or later. Fixes are available for 112 affected products.

CVE & CISA-KEV Catalog

CVE-2023-28366

HIGH

7.5

CVSS v3

NVD

Description

The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that can be abused remotely when a client sends many QoS 2 messages with duplicate message IDs, and fails to respond to PUBREC commands. This occurs because of mishandling of EAGAIN from the libc send function.

CWE-401Missing Release of Memory (Memory Leak)

How to fix

Remediation Available

mosquittoDebian

Fixed in:2.0.11-1+deb11u1CVE-2023-28366

Fixed in:2.0.11-1.2+deb12u1CVE-2023-28366

Fixed in:2.0.17-1CVE-2023-28366

ansible-collection-redhat-satelliteRocky

Fixed in:0:3.9.0-3.el8satRHSA-2024:1061

ansible-collection-redhat-satelliteRed Hat / RHEL

Fixed in:0:3.9.0-3.el8satRHSA-2024:1061

candlepinRed Hat / RHEL

Fixed in:0:4.3.11-1.el8satRHSA-2024:0797

candlepinRocky

Fixed in:0:4.3.11-1.el8satRHSA-2024:0797

candlepin-selinuxRed Hat / RHEL

Fixed in:0:4.3.11-1.el8satRHSA-2024:0797

candlepin-selinuxRocky

Fixed in:0:4.3.11-1.el8satRHSA-2024:0797

createrepo_cRocky

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

createrepo_cRed Hat / RHEL

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

createrepo_c-debuginfoRed Hat / RHEL

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

createrepo_c-debuginfoRocky

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

createrepo_c-debugsourceRed Hat / RHEL

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

createrepo_c-debugsourceRocky

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

createrepo_c-libsRed Hat / RHEL

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

createrepo_c-libsRocky

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

createrepo_c-libs-debuginfoRed Hat / RHEL

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

createrepo_c-libs-debuginfoRocky

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

foremanRed Hat / RHEL

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foremanRocky

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-cliRocky

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-cliRed Hat / RHEL

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-debugRed Hat / RHEL

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-debugRocky

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

foreman-dynflow-sidekiqRocky

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-dynflow-sidekiqRed Hat / RHEL

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

foreman-ec2Red Hat / RHEL

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-ec2Rocky

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-installerRocky

Fixed in:1:3.5.2.7-1.el8satRHSA-2024:1061

Fixed in:1:3.7.0.7-1.el8satRHSA-2024:0797

foreman-installerRed Hat / RHEL

Fixed in:1:3.5.2.7-1.el8satRHSA-2024:1061

Fixed in:1:3.7.0.7-1.el8satRHSA-2024:0797

Fixed in:1:3.5.2.7-1.el8satRHSA-2024:1061

Fixed in:1:3.7.0.7-1.el8satRHSA-2024:0797

foreman-installer-katelloRed Hat / RHEL

Fixed in:1:3.7.0.7-1.el8satRHSA-2024:0797

Fixed in:1:3.5.2.7-1.el8satRHSA-2024:1061

foreman-installer-katelloRocky

Fixed in:1:3.5.2.7-1.el8satRHSA-2024:1061

Fixed in:1:3.7.0.7-1.el8satRHSA-2024:0797

foreman-journaldRed Hat / RHEL

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

foreman-journaldRocky

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

foreman-libvirtRed Hat / RHEL

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

foreman-libvirtRocky

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-openstackRed Hat / RHEL

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

foreman-openstackRocky

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-ovirtRocky

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

foreman-ovirtRed Hat / RHEL

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-postgresqlRocky

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-postgresqlRed Hat / RHEL

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

foreman-redisRocky

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-redisRed Hat / RHEL

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-serviceRocky

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

foreman-serviceRed Hat / RHEL

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-telemetryRed Hat / RHEL

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-telemetryRocky

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-vmwareRed Hat / RHEL

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

foreman-vmwareRocky

Fixed in:0:3.5.1.24-1.el8satRHSA-2024:1061

Fixed in:0:3.7.0.11-2.el8satRHSA-2024:0797

mosquittoRed Hat / RHEL

Fixed in:0:2.0.17-1.el8satRHSA-2024:1061

Fixed in:0:2.0.17-1.el8satRHSA-2024:0797

mosquittoRocky

Fixed in:0:2.0.17-1.el8satRHSA-2024:1061

Fixed in:0:2.0.17-1.el8satRHSA-2024:0797

mosquitto-debuginfoRed Hat / RHEL

Fixed in:0:2.0.17-1.el8satRHSA-2024:0797

Fixed in:0:2.0.17-1.el8satRHSA-2024:1061

mosquitto-debuginfoRocky

Fixed in:0:2.0.17-1.el8satRHSA-2024:0797

Fixed in:0:2.0.17-1.el8satRHSA-2024:1061

mosquitto-debugsourceRocky

Fixed in:0:2.0.17-1.el8satRHSA-2024:0797

Fixed in:0:2.0.17-1.el8satRHSA-2024:1061

mosquitto-debugsourceRed Hat / RHEL

Fixed in:0:2.0.17-1.el8satRHSA-2024:0797

Fixed in:0:2.0.17-1.el8satRHSA-2024:1061

puppet-agentRocky

Fixed in:0:7.27.0-1.el8satRHSA-2024:0797

puppet-agentRed Hat / RHEL

Fixed in:0:7.27.0-1.el8satRHSA-2024:0797

puppetserverRocky

Fixed in:0:7.14.0-1.el8satRHSA-2024:0797

puppetserverRed Hat / RHEL

Fixed in:0:7.14.0-1.el8satRHSA-2024:0797

python-pulp-containerRocky

Fixed in:0:2.14.11-1.el8pcRHSA-2024:0797

Fixed in:0:2.14.11-1.el8pcRHSA-2024:1061

python-pulp-containerRed Hat / RHEL

Fixed in:0:2.14.11-1.el8pcRHSA-2024:1061

Fixed in:0:2.14.11-1.el8pcRHSA-2024:0797

python-pulp-rpmRed Hat / RHEL

Fixed in:0:3.18.19-2.el8pcRHSA-2024:1061

python-pulp-rpmRocky

Fixed in:0:3.18.19-2.el8pcRHSA-2024:1061

python3-createrepo_cRocky

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

python3-createrepo_cRed Hat / RHEL

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

python3-createrepo_c-debuginfoRed Hat / RHEL

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

python3-createrepo_c-debuginfoRocky

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

python39-createrepo_cRocky

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

python39-createrepo_cRed Hat / RHEL

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

python39-createrepo_c-debuginfoRed Hat / RHEL

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

python39-createrepo_c-debuginfoRocky

Fixed in:0:1.0.2-2.el8pcRHSA-2024:1061

python39-pulp-containerRocky

Fixed in:0:2.14.11-1.el8pcRHSA-2024:1061

Fixed in:0:2.14.11-1.el8pcRHSA-2024:0797

python39-pulp-containerRed Hat / RHEL

Fixed in:0:2.14.11-1.el8pcRHSA-2024:0797

Fixed in:0:2.14.11-1.el8pcRHSA-2024:1061

python39-pulp-rpmRocky

Fixed in:0:3.18.19-2.el8pcRHSA-2024:1061

python39-pulp-rpmRed Hat / RHEL

Fixed in:0:3.18.19-2.el8pcRHSA-2024:1061

rubygem-foreman_bootdiskRed Hat / RHEL

Fixed in:0:21.0.5-1.el8satRHSA-2024:1061

Fixed in:0:21.2.1-1.el8satRHSA-2024:0797

rubygem-foreman_bootdiskRocky

Fixed in:0:21.0.5-1.el8satRHSA-2024:1061

Fixed in:0:21.2.1-1.el8satRHSA-2024:0797

rubygem-foreman_leappRocky

Fixed in:0:0.1.13-2.el8satRHSA-2024:1061

rubygem-foreman_leappRed Hat / RHEL

Fixed in:0:0.1.13-2.el8satRHSA-2024:1061

rubygem-google-protobufRed Hat / RHEL

Fixed in:0:3.24.3-1.el8satRHSA-2024:0797

rubygem-google-protobufRocky

Fixed in:0:3.24.3-1.el8satRHSA-2024:0797

rubygem-google-protobuf-debuginfoRocky

Fixed in:0:3.24.3-1.el8satRHSA-2024:0797

rubygem-google-protobuf-debuginfoRed Hat / RHEL

Fixed in:0:3.24.3-1.el8satRHSA-2024:0797

rubygem-google-protobuf-debugsourceRocky

Fixed in:0:3.24.3-1.el8satRHSA-2024:0797

rubygem-google-protobuf-debugsourceRed Hat / RHEL

Fixed in:0:3.24.3-1.el8satRHSA-2024:0797

rubygem-grpcRed Hat / RHEL

Fixed in:0:1.58.0-1.el8satRHSA-2024:0797

rubygem-grpcRocky

Fixed in:0:1.58.0-1.el8satRHSA-2024:0797

rubygem-kafoRed Hat / RHEL

Fixed in:0:7.2.0-1.el8satRHSA-2024:0797

rubygem-kafoRocky

Fixed in:0:7.2.0-1.el8satRHSA-2024:0797

rubygem-katelloRocky

Fixed in:0:4.9.0.21-1.el8satRHSA-2024:0797

Fixed in:0:4.7.0.36-1.el8satRHSA-2024:1061

rubygem-katelloRed Hat / RHEL

Fixed in:0:4.9.0.21-1.el8satRHSA-2024:0797

Fixed in:0:4.7.0.36-1.el8satRHSA-2024:1061

Fixed in:0:4.9.0.21-1.el8satRHSA-2024:0797

Fixed in:0:4.7.0.36-1.el8satRHSA-2024:1061

rubygem-pumaRed Hat / RHEL

Fixed in:0:6.3.1-1.el8satRHSA-2024:0797

rubygem-pumaRocky

Fixed in:0:6.3.1-1.el8satRHSA-2024:0797

rubygem-puma-debuginfoRed Hat / RHEL

Fixed in:0:6.3.1-1.el8satRHSA-2024:0797

rubygem-puma-debuginfoRocky

Fixed in:0:6.3.1-1.el8satRHSA-2024:0797

rubygem-puma-debugsourceRed Hat / RHEL

Fixed in:0:6.3.1-1.el8satRHSA-2024:0797

rubygem-puma-debugsourceRocky

Fixed in:0:6.3.1-1.el8satRHSA-2024:0797

rubygem-sidekiqRocky

Fixed in:0:6.5.12-1.el8satRHSA-2024:0797

rubygem-sidekiqRed Hat / RHEL

Fixed in:0:6.5.12-1.el8satRHSA-2024:0797

satelliteRed Hat / RHEL

Fixed in:0:6.13.7-1.el8satRHSA-2024:1061

Fixed in:0:6.14.2-1.el8satRHSA-2024:0797

Fixed in:0:6.13.7-1.el8satRHSA-2024:1061

satelliteRocky

Fixed in:0:6.14.2-1.el8satRHSA-2024:0797

Fixed in:0:6.13.7-1.el8satRHSA-2024:1061

satellite-capsuleRed Hat / RHEL

Fixed in:0:6.13.7-1.el8satRHSA-2024:1061

Fixed in:0:6.14.2-1.el8satRHSA-2024:0797

satellite-capsuleRocky

Fixed in:0:6.13.7-1.el8satRHSA-2024:1061

Fixed in:0:6.14.2-1.el8satRHSA-2024:0797

satellite-cliRed Hat / RHEL

Fixed in:0:6.13.7-1.el8satRHSA-2024:1061

Fixed in:0:6.14.2-1.el8satRHSA-2024:0797

satellite-cliRocky

Fixed in:0:6.13.7-1.el8satRHSA-2024:1061

Fixed in:0:6.14.2-1.el8satRHSA-2024:0797

satellite-cloneRed Hat / RHEL

Fixed in:0:3.5.0-1.el8satRHSA-2024:1061

satellite-cloneRocky

Fixed in:0:3.5.0-1.el8satRHSA-2024:1061

satellite-commonRed Hat / RHEL

Fixed in:0:6.13.7-1.el8satRHSA-2024:1061

Fixed in:0:6.14.2-1.el8satRHSA-2024:0797

satellite-commonRocky

Fixed in:0:6.13.7-1.el8satRHSA-2024:1061

Fixed in:0:6.14.2-1.el8satRHSA-2024:0797

satellite-convert2rhel-toolkitRed Hat / RHEL

Fixed in:0:1.0.1-1.el8satRHSA-2024:0797

satellite-convert2rhel-toolkitRocky

Fixed in:0:1.0.1-1.el8satRHSA-2024:0797

mosquittoUbuntu

Fixed in:1.6.9-1ubuntu0.1~esm1USN-6492-1

Fixed in:2.0.11-1ubuntu1.1USN-6492-1

Fixed in:2.0.11-1.2ubuntu0.1USN-6492-1

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

1.11%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory1

compass-security.com

Release Notes2

Other references3

Related Vulnerabilities

Other CWE-401 (Missing Release of Memory (Memory Leak)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13934	High	7.5	64%	-	Fix
CVE-2016-6304	High	7.5	63%	-	Fix
CVE-2019-12265	Medium	5.3	55%	-	Fix
CVE-2001-0136	Medium	5.0	45%	-	-
CVE-2016-4232	High	7.5	36%	-	-
CVE-2001-0543	Medium	5.0	21%	-	-

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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 2025-06-26.