Bug 2532605 (CVE-2026-90556)

Summary: CVE-2026-90556 freeciv: Freeciv: Memory corruption via crafted savegame files
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Freeciv. This vulnerability, a heap buffer overflow in the `worklist_load()` function, occurs when processing specially crafted savegame files. An attacker can create a malicious savegame file that, when loaded by a user or server operator, causes memory corruption. This could lead to system instability or other unpredictable behavior.
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Bug Depends On: 2532938    
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Description OSIDB Bzimport 2026-09-12 18:11:25 UTC 
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.