Description
An issue was discovered in InspIRCd 2 before 2.0.29 and 3 before 3.6.0. The pgsql module contains a use after free vulnerability. When combined with the sqlauth or sqloper modules, this vulnerability can be used for remote crashing of an InspIRCd server by any user able to connect to a server.
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 13 | inspircd | 3.8.0-1 | — |
| Debian 12 | inspircd | 3.8.0-1 | — |
| Debian 10 | inspircd | 2.0.27-1+deb10u1 | DSA-4764-1 |
| Debian 9 | inspircd | 2.0.23-2+deb9u1 | DLA-2375-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | inspircd | 3.4.0-2ubuntu1+esm1 | USN-7405-1 |
| Ubuntu Pro 18.04 LTS | inspircd | 2.0.24-1ubuntu1+esm1 | USN-7405-1 |
| Ubuntu Pro 16.04 LTS | inspircd | 2.0.20-5ubuntu0.1~esm1 | USN-7405-1 |
Advisories 3
- USN-7405-1 inspircd vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-4764-1 inspircd - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2375-1 inspircd - security update Debian Security (DSA / DLA) · Mar 9, 2026