Description
The server in Chocolate Doom 3.0.0 and Crispy Doom 5.8.0 doesn't validate the user-controlled num_players value, leading to a buffer overflow. A malicious user can overwrite the server's stack.
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 | chocolate-doom | 3.0.1-1 | — |
| Debian 14 | crispy-doom | 5.9.0-1 | — |
| Debian 13 | chocolate-doom | 3.0.1-1 | — |
| Debian 13 | crispy-doom | 5.9.0-1 | — |
| Debian 12 | chocolate-doom | 3.0.1-1 | — |
| Debian 12 | crispy-doom | 5.9.0-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | crispy-doom +1 | No fix yet | — |
| Ubuntu 18.04 LTS | chocolate-doom | No fix yet | — |
| Ubuntu 16.04 LTS | chocolate-doom | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP1 | chocolate-doom | 3.0.1-bp151.4.3.1 | openSUSE-SU-2020:0947-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | chocolate-doom | 3.0.1-lp152.4.3.1 | openSUSE-SU-2020:0939-1 |
| openSUSE Leap 15.1 | chocolate-doom | 3.0.1-lp151.3.3.1 | openSUSE-SU-2020:0928-1 |
Advisories 3
- openSUSE-SU-2020:0947-1 Security update for chocolate-doom SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0928-1 Security update for chocolate-doom SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0939-1 Security update for chocolate-doom SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://github.com/chocolate-doom/chocolate-doom/issues/1293
- openSUSE-SU-2020:0928 vendor-advisory
- openSUSE-SU-2020:0939 vendor-advisory
- openSUSE-SU-2020:0947 vendor-advisory