{
  "cveId": "CVE-2026-33250",
  "url": "https://patchblox.com/security/cve/CVE-2026-33250",
  "summary": "CVE-2026-33250 is fixed in 10 products on 1 platform, first by DSA-6173-1, released March 21, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "freeciv: Freeciv21 is a free open source, turn-based, empire-building strategy game",
  "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\u0027s 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.",
  "published": "2026-03-21T00:00:00Z",
  "severity": "Medium",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00853,
  "epssPercentile": 0.58517,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "freeciv",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "3.0.6-1\u002Bdeb12u1",
      "fix": "DSA-6173-1",
      "url": "https://patchblox.com/security/fix/linux/dsa-6173-1",
      "released": "2026-03-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.1.4\u002Bds-2\u002Bdeb13u1",
      "fix": "DSA-6173-1",
      "url": "https://patchblox.com/security/fix/linux/dsa-6173-1",
      "released": "2026-03-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv",
      "release": "Debian 14",
      "fixedVersion": "3.2.4\u002Bds-1",
      "fix": "DEBIAN-CVE-2026-33250",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33250",
      "released": "2026-03-24T00:16:29Z"
    },
    {
      "platform": "linux",
      "product": "freeciv",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-1ubuntu0.1~esm1",
      "fix": "freeciv 2.5.10-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freeciv-2.5.10-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.2-1ubuntu0.1~esm1",
      "fix": "freeciv 2.6.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freeciv-2.6.2-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.6.6-1ubuntu0.1~esm1",
      "fix": "freeciv 2.6.6-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freeciv-2.6.6-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.1.0\u002Bds-1ubuntu0.1~esm1",
      "fix": "freeciv 3.1.0\u002Bds-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-freeciv-3.1.0-ds-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.2.4-bp160.1.1",
      "fix": "OPENSUSE-SU-2026:20423-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20423-1",
      "released": "2026-03-23T15:34:35Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-extras",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-1ubuntu0.1~esm1",
      "fix": "freeciv-client-extras 2.5.10-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freeciv-client-extras-2.5.10-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-extras",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.2-1ubuntu0.1~esm1",
      "fix": "freeciv-client-extras 2.6.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freeciv-client-extras-2.6.2-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-extras",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.6.6-1ubuntu0.1~esm1",
      "fix": "freeciv-client-extras 2.6.6-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freeciv-client-extras-2.6.6-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-extras",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.1.0\u002Bds-1ubuntu0.1~esm1",
      "fix": "freeciv-client-extras 3.1.0\u002Bds-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-freeciv-client-extras-3.1.0-ds-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-gtk",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-1ubuntu0.1~esm1",
      "fix": "freeciv-client-gtk 2.5.10-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freeciv-client-gtk-2.5.10-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-gtk",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.2-1ubuntu0.1~esm1",
      "fix": "freeciv-client-gtk 2.6.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freeciv-client-gtk-2.6.2-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-gtk",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.6.6-1ubuntu0.1~esm1",
      "fix": "freeciv-client-gtk 2.6.6-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freeciv-client-gtk-2.6.6-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-gtk3",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-1ubuntu0.1~esm1",
      "fix": "freeciv-client-gtk3 2.5.10-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freeciv-client-gtk3-2.5.10-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-gtk3",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.2-1ubuntu0.1~esm1",
      "fix": "freeciv-client-gtk3 2.6.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freeciv-client-gtk3-2.6.2-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-gtk3",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.6.6-1ubuntu0.1~esm1",
      "fix": "freeciv-client-gtk3 2.6.6-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freeciv-client-gtk3-2.6.6-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-gtk3",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.1.0\u002Bds-1ubuntu0.1~esm1",
      "fix": "freeciv-client-gtk3 3.1.0\u002Bds-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-freeciv-client-gtk3-3.1.0-ds-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-qt",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-1ubuntu0.1~esm1",
      "fix": "freeciv-client-qt 2.5.10-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freeciv-client-qt-2.5.10-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-qt",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.2-1ubuntu0.1~esm1",
      "fix": "freeciv-client-qt 2.6.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freeciv-client-qt-2.6.2-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-qt",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.6.6-1ubuntu0.1~esm1",
      "fix": "freeciv-client-qt 2.6.6-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freeciv-client-qt-2.6.6-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-qt",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.1.0\u002Bds-1ubuntu0.1~esm1",
      "fix": "freeciv-client-qt 3.1.0\u002Bds-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-freeciv-client-qt-3.1.0-ds-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-sdl",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-1ubuntu0.1~esm1",
      "fix": "freeciv-client-sdl 2.5.10-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freeciv-client-sdl-2.5.10-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-sdl",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.2-1ubuntu0.1~esm1",
      "fix": "freeciv-client-sdl 2.6.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freeciv-client-sdl-2.6.2-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-sdl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.6.6-1ubuntu0.1~esm1",
      "fix": "freeciv-client-sdl 2.6.6-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freeciv-client-sdl-2.6.6-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-client-sdl",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.1.0\u002Bds-1ubuntu0.1~esm1",
      "fix": "freeciv-client-sdl 3.1.0\u002Bds-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-freeciv-client-sdl-3.1.0-ds-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-data",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-1ubuntu0.1~esm1",
      "fix": "freeciv-data 2.5.10-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freeciv-data-2.5.10-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-data",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.2-1ubuntu0.1~esm1",
      "fix": "freeciv-data 2.6.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freeciv-data-2.6.2-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-data",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.6.6-1ubuntu0.1~esm1",
      "fix": "freeciv-data 2.6.6-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freeciv-data-2.6.6-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-data",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.1.0\u002Bds-1ubuntu0.1~esm1",
      "fix": "freeciv-data 3.1.0\u002Bds-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-freeciv-data-3.1.0-ds-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-ruleset-tools",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.1.0\u002Bds-1ubuntu0.1~esm1",
      "fix": "freeciv-ruleset-tools 3.1.0\u002Bds-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-freeciv-ruleset-tools-3.1.0-ds-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-server",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-1ubuntu0.1~esm1",
      "fix": "freeciv-server 2.5.10-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freeciv-server-2.5.10-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-server",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.2-1ubuntu0.1~esm1",
      "fix": "freeciv-server 2.6.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freeciv-server-2.6.2-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-server",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.6.6-1ubuntu0.1~esm1",
      "fix": "freeciv-server 2.6.6-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freeciv-server-2.6.6-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-server",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.1.0\u002Bds-1ubuntu0.1~esm1",
      "fix": "freeciv-server 3.1.0\u002Bds-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-freeciv-server-3.1.0-ds-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-sound-standard",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-1ubuntu0.1~esm1",
      "fix": "freeciv-sound-standard 2.5.10-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freeciv-sound-standard-2.5.10-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-sound-standard",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.2-1ubuntu0.1~esm1",
      "fix": "freeciv-sound-standard 2.6.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freeciv-sound-standard-2.6.2-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    },
    {
      "platform": "linux",
      "product": "freeciv-sound-standard",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.6.6-1ubuntu0.1~esm1",
      "fix": "freeciv-sound-standard 2.6.6-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freeciv-sound-standard-2.6.6-1ubuntu0.1-esm1",
      "released": "2026-03-23T17:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}