Upstream information

CVE-2026-33250 at MITRE

Description

Freeciv21 is a free open source, turn-based, empire-building strategy game. Versions prior to 3.1.1 crash with a stack overflow when receiving specially-crafted packets. A remote attacker can use this to take down any public server. A malicious server can use this to crash the game on the player's machine. Authentication is not needed and, by default, logs do not contain any useful information. All users should upgrade to Freeciv21 version 3.1.1. Running the server behind a firewall can help mitigate the issue for non-public servers. For local games, Freeciv21 restricts connections to the current user and is therefore not affected.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (GitHub)
Base Score 7.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1260036 [IN_PROGRESS]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
SUSE Package Hub 15 SP6
  • freeciv >= 3.0.10-bp156.2.3.1
  • freeciv-gtk3 >= 3.0.10-bp156.2.3.1
  • freeciv-lang >= 3.0.10-bp156.2.3.1
  • freeciv-qt >= 3.0.10-bp156.2.3.1
 Patchnames:
openSUSE-2026-155
openSUSE Leap 15.6
  • freeciv >= 3.0.10-bp156.2.3.1
  • freeciv-gtk3 >= 3.0.10-bp156.2.3.1
  • freeciv-lang >= 3.0.10-bp156.2.3.1
  • freeciv-qt >= 3.0.10-bp156.2.3.1
 Patchnames:
openSUSE-2026-155
openSUSE Leap 16.0
  • freeciv >= 3.2.4-bp160.1.1
  • freeciv-gtk3 >= 3.2.4-bp160.1.1
  • freeciv-gtk4 >= 3.2.4-bp160.1.1
  • freeciv-lang >= 3.2.4-bp160.1.1
  • freeciv-qt >= 3.2.4-bp160.1.1
  • freeciv-sdl2 >= 3.2.4-bp160.1.1
 Patchnames:
openSUSE-Leap-16.0-packagehub-175
openSUSE Tumbleweed
  • freeciv >= 3.2.4-1.1
  • freeciv-gtk3 >= 3.2.4-1.1
  • freeciv-gtk4 >= 3.2.4-1.1
  • freeciv-lang >= 3.2.4-1.1
  • freeciv-qt >= 3.2.4-1.1
  • freeciv-sdl2 >= 3.2.4-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-10401

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products past their end of life and not receiving proactive updates anymore.
SUSE Package Hub 15 SP6 freeciv Released

SUSE Timeline for this CVE

CVE page created: Sat Mar 21 20:15:00 2026
CVE page last modified: Mon Apr 27 21:06:48 2026