Freeciv versions before 3.2.6 contain a heap buffer overflow in worklist_load() when processing savegame files with declared worklist lengths… (CVE-2026-90556)
Freeciv versions before 3.2.6 contain a heap buffer overflow in worklist_load() when processing savegame files with declared worklist lengths exceeding the fixed array bound of 64 elements. Attackers can craft malicious savegame files that write past the entries array into adjacent heap-allocated struct fields, potentially corrupting memory when a user or server operator loads the file.
AI Analysis
Technical Summary
The vulnerability in Freeciv affects versions before 3.2.6 and is a heap buffer overflow in the worklist_load() function. It arises when savegame files specify worklist lengths larger than the fixed array bound of 64 elements, leading to writes beyond the allocated array into adjacent heap memory. This can corrupt memory structures and potentially lead to code execution or denial of service when the savegame file is loaded.
Potential Impact
Successful exploitation can result in high impact including confidentiality, integrity, and availability loss due to heap memory corruption. An attacker can craft malicious savegame files that trigger the overflow when loaded, potentially causing crashes or arbitrary code execution with the privileges of the user loading the file.
Mitigation Recommendations
A fixed version 3.2.6 or later addresses this vulnerability. Users and server operators should upgrade to Freeciv version 3.2.6 or later to remediate this issue. No other mitigation or temporary workaround is indicated.
Freeciv versions before 3.2.6 contain a heap buffer overflow in worklist_load() when processing savegame files with declared worklist lengths… (CVE-2026-90556)
Description
Freeciv versions before 3.2.6 contain a heap buffer overflow in worklist_load() when processing savegame files with declared worklist lengths exceeding the fixed array bound of 64 elements. Attackers can craft malicious savegame files that write past the entries array into adjacent heap-allocated struct fields, potentially corrupting memory when a user or server operator loads the file.
CVSS v3.1
Score 7.8high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Freeciv affects versions before 3.2.6 and is a heap buffer overflow in the worklist_load() function. It arises when savegame files specify worklist lengths larger than the fixed array bound of 64 elements, leading to writes beyond the allocated array into adjacent heap memory. This can corrupt memory structures and potentially lead to code execution or denial of service when the savegame file is loaded.
Potential Impact
Successful exploitation can result in high impact including confidentiality, integrity, and availability loss due to heap memory corruption. An attacker can craft malicious savegame files that trigger the overflow when loaded, potentially causing crashes or arbitrary code execution with the privileges of the user loading the file.
Mitigation Recommendations
A fixed version 3.2.6 or later addresses this vulnerability. Users and server operators should upgrade to Freeciv version 3.2.6 or later to remediate this issue. No other mitigation or temporary workaround is indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-2p7g-gcvc-7p6m
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-90556"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6aa5eff955bf5e2cf5ef6f97
Added to database: 09/13/2026, 00:36:09 UTC
Last enriched: 09/13/2026, 00:37:44 UTC
Last updated: 09/13/2026, 01:41:56 UTC
Views: 4
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