Description
In Eclipse Mosquitto 1.4.14, if a Mosquitto instance is set running with a configuration file, then sending a HUP signal to server triggers the configuration to be reloaded from disk. If there are lots of clients connected so that there are no more file descriptors/sockets available (default limit typically 1024 file descriptors on Linux), then opening the configuration file will fail.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Eclipse Foundation | Eclipse Mosquitto | 1.4.14 | — |
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 | 1.4.15-1 | — |
| Debian 13 | mosquitto | 1.4.15-1 | — |
| Debian 12 | mosquitto | 1.4.15-1 | — |
| Debian 9 | mosquitto | 1.4.10-3+deb9u2 | DSA-4325-1 |
| Debian 8 | mosquitto | 1.3.4-2+deb8u2 | DLA-1409-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | mosquitto | 0.15-2+deb7u3 | DLA-1334-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | mosquitto | 1.4.8-1ubuntu0.16.04.4 | — |
| Ubuntu 14.04 LTS | mosquitto | 0.15-2+deb7u3ubuntu0.1 | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.23 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.22 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.21 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.20 | mosquitto | 1.4.15-r0 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.18 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.17 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.16 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.15 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.14 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.13 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.12 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.11 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.10 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.9 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.8 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.7 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.6 | mosquitto | 1.4.15-r0 | — |
| Alpine v3.5 | mosquitto | 1.4.15-r0 | — |
Advisories 3
- DSA-4325-1 mosquitto - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1409-1 mosquitto - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1334-1 mosquitto - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- [debian-lts-announce] 20180331 [SECURITY] [DLA 1334-1] mosquitto security update mailing-list
- https://mosquitto.org/blog/2018/02/security-advisory-cve-2017-7651-cve-2017-7652/
- [debian-lts-announce] 20180629 [SECURITY] [DLA 1409-1] mosquitto security update mailing-list
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=530102
- DSA-4325 vendor-advisory