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GHSA-M27M-5MQJ-H84F

Vulnerability from github – Published: 2026-09-12 18:30 – Updated: 2026-09-12 18:30
VLAI
Details

Freeciv versions 3.1.0 through 3.2.5 contain an out-of-bounds read vulnerability in sg_load_player_unit() when processing savegame files with invalid unit activity indices. An attacker can craft a malicious savegame file with an out-of-range activity index that bypasses bounds checking and causes a crash or limited heap memory exposure when loaded.

Severity
6.1 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
6.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-90557"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-12T18:16:44Z",
    "severity": "MODERATE"
  },
  "details": "Freeciv versions 3.1.0 through 3.2.5 contain an out-of-bounds read vulnerability in sg_load_player_unit() when processing savegame files with invalid unit activity indices. An attacker can craft a malicious savegame file with an out-of-range activity index that bypasses bounds checking and causes a crash or limited heap memory exposure when loaded.",
  "id": "GHSA-m27m-5mqj-h84f",
  "modified": "2026-09-12T18:30:22Z",
  "published": "2026-09-12T18:30:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90557"
    },
    {
      "type": "WEB",
      "url": "https://github.com/freeciv/freeciv/commit/ef0c76c2765fe383140eb1a70dbea1228844152e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/freeciv/freeciv"
    },
    {
      "type": "WEB",
      "url": "https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame2.c#L4282"
    },
    {
      "type": "WEB",
      "url": "https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame3.c#L6108"
    },
    {
      "type": "WEB",
      "url": "https://github.com/freeciv/freeciv/releases/tag/R3_2_6"
    },
    {
      "type": "WEB",
      "url": "https://redmine.freeciv.org/issues/2162"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/freeciv-3.1.0-through-3.2.5-out-of-bounds-read-via-savegame"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}



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