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CVE-2026-90557 (GCVE-0-2026-90557)

Vulnerability from cvelistv5 – Published: 2026-09-12 18:06 – Updated: 2026-09-12 18:06
VLAI
Title
Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame
Summary
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
6.9 (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
6.1 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
freeciv freeciv Affected: 3.1.0 , < 3.2.6 (semver)
    cpe:2.3:a:freeciv:freeciv:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-23 00:00
Credits
Tristan Madani
Show details on NVD website
To clipboard 

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          "url": "https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame2.c#L4282"
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    "dateReserved": "2026-09-12T11:13:43.326Z",
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    "redhat_vex": {
      "current_release_date": "2026-09-14T07:38:07+00:00",
      "cve": "CVE-2026-90557",
      "id": "CVE-2026-90557",
      "initial_release_date": "2026-09-12T18:06:41.706000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "freeciv: Freeciv: Out-of-bounds read vulnerability in savegame processing",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90557.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.