# CVE-2026-90556: freeciv: Freeciv versions before 3.2.6 contain a heap buffer overflow in worklist_load() when processing savegame files with d...

CVE-2026-90556 is fixed in 9 products on 1 platform, first by FEDORA-2026-75BDE5D061, released September 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-90556
- Priority: Routine
- CVSS: n/a (low)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 10, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | freeciv Debian 14 | 3.2.6+ds-1 | [DEBIAN-CVE-2026-90556](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90556.md) | Sep 13, 2026 |
| Linux | freeciv Fedora 43 | 3.2.6-1.fc43 | [FEDORA-2026-75BDE5D061](https://patchblox.com/security/data/fix/linux/fedora-2026-75bde5d061.md) | Sep 10, 2026 |
| Linux | freeciv-common Fedora 43 | 3.2.6-1.fc43 | [FEDORA-2026-75BDE5D061](https://patchblox.com/security/data/fix/linux/fedora-2026-75bde5d061.md) | Sep 10, 2026 |
| Linux | freeciv-common-debuginfo Fedora 43 | 3.2.6-1.fc43 | [FEDORA-2026-75BDE5D061](https://patchblox.com/security/data/fix/linux/fedora-2026-75bde5d061.md) | Sep 10, 2026 |
| Linux | freeciv-debuginfo Fedora 43 | 3.2.6-1.fc43 | [FEDORA-2026-75BDE5D061](https://patchblox.com/security/data/fix/linux/fedora-2026-75bde5d061.md) | Sep 10, 2026 |
| Linux | freeciv-debugsource Fedora 43 | 3.2.6-1.fc43 | [FEDORA-2026-75BDE5D061](https://patchblox.com/security/data/fix/linux/fedora-2026-75bde5d061.md) | Sep 10, 2026 |
| Linux | freeciv-gtk Fedora 43 | 3.2.6-1.fc43 | [FEDORA-2026-75BDE5D061](https://patchblox.com/security/data/fix/linux/fedora-2026-75bde5d061.md) | Sep 10, 2026 |
| Linux | freeciv-gtk-debuginfo Fedora 43 | 3.2.6-1.fc43 | [FEDORA-2026-75BDE5D061](https://patchblox.com/security/data/fix/linux/fedora-2026-75bde5d061.md) | Sep 10, 2026 |
| Linux | freeciv-qt Fedora 43 | 3.2.6-1.fc43 | [FEDORA-2026-75BDE5D061](https://patchblox.com/security/data/fix/linux/fedora-2026-75bde5d061.md) | Sep 10, 2026 |
| Linux | freeciv-qt-debuginfo Fedora 43 | 3.2.6-1.fc43 | [FEDORA-2026-75BDE5D061](https://patchblox.com/security/data/fix/linux/fedora-2026-75bde5d061.md) | Sep 10, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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