Description
WeeChat before 4.4.2 has an integer overflow and resultant buffer overflow at core/core-string.c when there are more than two billion items in a list. This affects string_free_split_shared , string_free_split, string_free_split_command, and string_free_split_tags.
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 | weechat | 4.4.2-1 | — |
| Debian 13 | weechat | 4.4.2-1 | — |
| Debian 12 | weechat | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | weechat | No fix yet | — |
| Ubuntu 22.04 LTS | weechat | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | weechat | No fix yet | — |
| Ubuntu Pro 18.04 LTS | weechat | No fix yet | — |
| Ubuntu Pro 16.04 LTS | weechat | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | weechat | 4.5.1-1.1 | openSUSE-SU-2025:14734-1 |
Advisories 1
- openSUSE-SU-2025:14734-1 weechat-4.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026