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CVE-2026-90557— Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame

Quick assessment

Affected
freeciv freeciv
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeCiv 版本 3.1.0 至 3.2.5 中的 函数存在越界读取漏洞。当处理包含无效单位活动索引的存档文件时，攻击者可以构造一个带有超范围活动索引的恶意存档文件，该索引会绕过边界检查，导致游戏崩溃或有限的堆内存信息泄露。

CVSS 6.1 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
freeciv freeciv 3.1.0< 3.2.6 affected
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I. Basic Information for CVE-2026-90557

Vulnerability Information
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Vulnerability Title
Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
freeciv freeciv 3.1.0 ~ 3.2.6 -

II. Public POCs for CVE-2026-90557

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-90557

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Patches & Fixes for CVE-2026-90557 (1)

Vendor Advisories for CVE-2026-90557 (1)

Vendor Pages for CVE-2026-90557 (2)

Other References for CVE-2026-90557 (1)

Other References for CVE-2026-90557 (1)

IV. Related Vulnerabilities

Same product: freeciv
Same vendor: freeciv
Same weakness: CWE-125

V. Comments for CVE-2026-90557

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