Description
Irssi 1.3.x and 1.4.x before 1.4.4 has a use-after-free because of use of a stale special collector reference. This occurs when printing of a non-formatted line is concurrent with printing of a formatted line.
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 | 1.4.3-2 | — |
| Debian 13 | irssi | 1.4.3-2 | — |
| Debian 12 | irssi | 1.4.3-2 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | irssi | 1.4.4-2.1 | openSUSE-SU-2024:12848-1 |
Advisories 1
- openSUSE-SU-2024:12848-1 irssi-1.4.4-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026