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… (CVE-2026-90557)
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.
AI Analysis
Technical Summary
The vulnerability in Freeciv (CVE-2026-90557) is an out-of-bounds read in the sg_load_player_unit() function triggered by savegame files with invalid unit activity indices. This improper bounds checking can lead to application crashes or limited heap memory exposure. The issue affects versions 3.1.0 through 3.2.5. The CVSS 3.1 base score is 6.1, indicating medium severity, with an attack vector requiring local access and user interaction.
Potential Impact
An attacker with local access can craft a malicious savegame file that, when loaded by the vulnerable Freeciv versions, causes the application to crash or leak limited heap memory. There is no indication of remote exploitation or privilege escalation. The confidentiality impact is limited, integrity is not affected, and availability impact is high due to potential crashes.
Mitigation Recommendations
No official patch or fix is currently documented. Users should avoid loading untrusted or suspicious savegame files to mitigate risk. Monitor the vendor advisory for updates regarding patches or official remediation.
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… (CVE-2026-90557)
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.
CVSS v3.1
Score 6.1medium
Affected software
pkg:github/freeciv/freecivRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Freeciv (CVE-2026-90557) is an out-of-bounds read in the sg_load_player_unit() function triggered by savegame files with invalid unit activity indices. This improper bounds checking can lead to application crashes or limited heap memory exposure. The issue affects versions 3.1.0 through 3.2.5. The CVSS 3.1 base score is 6.1, indicating medium severity, with an attack vector requiring local access and user interaction.
Potential Impact
An attacker with local access can craft a malicious savegame file that, when loaded by the vulnerable Freeciv versions, causes the application to crash or leak limited heap memory. There is no indication of remote exploitation or privilege escalation. The confidentiality impact is limited, integrity is not affected, and availability impact is high due to potential crashes.
Mitigation Recommendations
No official patch or fix is currently documented. Users should avoid loading untrusted or suspicious savegame files to mitigate risk. Monitor the vendor advisory for updates regarding patches or official remediation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-m27m-5mqj-h84f
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-90557"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6aa5eff555bf5e2cf5ef69a8
Added to database: 09/13/2026, 00:36:05 UTC
Last enriched: 09/13/2026, 00:37:17 UTC
Last updated: 09/13/2026, 03:16:18 UTC
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.