Description
An issue was discovered in Irssi before 1.0.4. While updating the internal nick list, Irssi could incorrectly use the GHashTable interface and free the nick while updating it. This would then result in use-after-free conditions on each access of the hash table.
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 | irssi | 1.0.4-1 | — |
| Debian 13 | irssi | 1.0.4-1 | — |
| Debian 12 | irssi | 1.0.4-1 | — |
| Debian 7 | irssi | 0.8.15-5+deb7u3 | DLA-1089-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | irssi | 0.8.19-1ubuntu1.5 | USN-3465-1 |
| Ubuntu 14.04 LTS | irssi | 0.8.15-5ubuntu3.3 | USN-3465-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 | irssi | 1.0.4-28.1 | openSUSE-SU-2017:1824-1, openSUSE-SU-2017:1823-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | irssi | 1.2.3-2.4 | openSUSE-SU-2024:10865-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | irssi | 1.0.4-r0 | — |
| Alpine v3.23 | irssi | 1.0.4-r0 | — |
| Alpine v3.22 | irssi | 1.0.4-r0 | — |
| Alpine v3.21 | irssi | 1.0.4-r0 | — |
| Alpine v3.20 | irssi | 1.0.4-r0 | — |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | irssi | 1.0.4-r0 | — |
| Alpine v3.18 | irssi | 1.0.4-r0 | — |
| Alpine v3.17 | irssi | 1.0.4-r0 | — |
| Alpine v3.16 | irssi | 1.0.4-r0 | — |
| Alpine v3.15 | irssi | 1.0.4-r0 | — |
| Alpine v3.14 | irssi | 1.0.4-r0 | — |
| Alpine v3.13 | irssi | 1.0.4-r0 | — |
| Alpine v3.12 | irssi | 1.0.4-r0 | — |
| Alpine v3.11 | irssi | 1.0.4-r0 | — |
| Alpine v3.10 | irssi | 1.0.4-r0 | — |
| Alpine v3.9 | irssi | 1.0.4-r0 | — |
| Alpine v3.8 | irssi | 1.0.4-r0 | — |
| Alpine v3.7 | irssi | 1.0.4-r0 | — |
| Alpine v3.5 | irssi | 0.8.21.r2 | — |
| Alpine v3.4 | irssi | 0.8.21.r2 | — |
| Alpine v3.3 | irssi | 0.8.21.r2 | — |
Advisories 5
- USN-3465-1 irssi vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-1089-1 irssi - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10865-1 irssi-1.2.3-2.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2017:1824-1 Security update for irssi SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2017:1823-1 Security update for irssi SUSE / openSUSE Security Updates · May 7, 2025