Description
In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Eclipse | Mosquitto | < 2.0.16 | 2.0.16 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mosquitto | 2.0.17-1 | — |
| Debian 13 | mosquitto | 2.0.17-1 | — |
| Debian 12 | mosquitto | 2.0.11-1.2+deb12u1 | DSA-5511-1 |
| Debian 11 | mosquitto | 2.0.11-1+deb11u1 | DSA-5511-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | mosquitto | 2.0.11-1ubuntu1.1 | USN-6492-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | mosquitto | 1.6.9-1ubuntu0.1~esm1 | USN-6492-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Satellite Utils 6 | foreman +1 | 3.5.1.24-1.el8sat | RHSA-2024:1061 |
| Red Hat Satellite Capsule 6 | foreman +1 | 3.5.1.24-1.el8sat | RHSA-2024:1061 |
| Red Hat Satellite Capsule 6 | mosquitto | 2.0.17-1.el8sat | RHSA-2024:1061, RHSA-2024:0797 |
| Red Hat Satellite Capsule 6 | puppet-agent | 7.27.0-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite Capsule 6 | puppetserver | 7.14.0-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | candlepin +1 | 4.3.11-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | foreman +12 | 3.5.1.24-1.el8sat | RHSA-2024:1061 |
| Red Hat Satellite 6 | mosquitto | 2.0.17-1.el8sat | RHSA-2024:1061, RHSA-2024:0797 |
| Red Hat Satellite 6 | puppet-agent | 7.27.0-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | puppetserver | 7.14.0-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | rubygem-grpc | 1.58.0-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | rubygem-puma | 6.3.1-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | rubygem-sidekiq | 6.5.12-1.el8sat | RHSA-2024:0797 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | mosquitto | 2.0.16-r0 | — |
| Alpine v3.23 | mosquitto | 2.0.16-r0 | — |
| Alpine v3.22 | mosquitto | 2.0.16-r0 | — |
| Alpine v3.21 | mosquitto | 2.0.16-r0 | — |
| Alpine v3.20 | mosquitto | 2.0.16-r0 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | mosquitto | 2.0.16-r0 | — |
| Alpine v3.18 | mosquitto | 2.0.16-r0 | — |
Advisories 6
- RHSA-2024:0797 Red Hat Security Advisory: Satellite 6.14.2 Async Security Update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:1061 Red Hat Security Advisory: Red Hat Satellite 6 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-6492-1 mosquitto vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5511-1 mosquitto - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SCA-2025-0006 Vulnerability affecting picoScan and multiScan SICK PSIRT · Apr 28, 2025
- WID-SEC-2023-2724 IBM Integration Bus: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Oct 22, 2023