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Published

Permalink CVE-2026-90557

6.9 MEDIUM

CVSS version (CVSS): 4.0
Attack Vector (AV): Local (L)
Attack Complexity (AC): Low (L)
Attack Requirement (AT): None (N)
Privileges Required (PR): None (N)
User Interaction (UI): Passive (P)
Vulnerable System Impact Confidentiality (VC): Low (L)
Vulnerable System Impact Integrity (VI): None (N)
Vulnerable System Impact Availability (VA): High (H)
Subsequent System Impact Confidentiality (SC): None (N)
Subsequent System Impact Integrity (SI): None (N)
Subsequent System Impact Availability (SA): None (N)
Modified Attack Vector (MAV): Local (L)
Modified Attack Complexity (MAC): Low (L)
Modified Attack Requirement (MAT): None (N)
Modified Privileges Required (MPR): None (N)
Modified User Interaction (MUI): Passive (P)
Modified Vulnerable System Impact Confidentiality (MVC): Low (L)
Modified Vulnerable System Impact Integrity (MVI): None (N)
Modified Vulnerable System Impact Availability (MVA): High (H)
Modified Subsequent System Impact Confidentiality (MSC): Negligible (N)
Modified Subsequent System Impact Integrity (MSI): Negligible (N)
Modified Subsequent System Impact Availability (MSA): Negligible (N)
Safety (S): Not Defined (X)
Automatable (AU): Not Defined (X)
Recovery (R): Not Defined (X)
Value Density (V): Not Defined (X)
Vulnerability Response Effort (RE): Not Defined (X)
Provider Urgency (U): Not Defined (X)
Confidentiality Req. (CR): Not Defined (X)
Integrity Req. (IR): Not Defined (X)
Availability Req. (AR): Not Defined (X)
Exploit Maturity (E): Not Defined (X)

updated 9 hours ago by @LeSuisse Activity log

Created suggestion 17 hours ago
@LeSuisse accepted 9 hours ago
@LeSuisse published on GitHub 9 hours ago

Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame

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.

References

Patch Commit patch
https://github.com/freeciv/freeciv product
https://redmine.freeciv.org/issues/2162 issue-tracking
https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame3.c#L6108 technical-description
freeciv R3_2_6 Release Notes release-notes
https://github.com/freeciv/freeciv/blob/R3_2_5/server/savegame/savegame2.c#L4282 technical-description
VulnCheck Advisory: Freeciv 3.1.0 through 3.2.5 Out-of-Bounds Read via Savegame third-party-advisory

Affected products

freeciv

<3.2.6

Matching in nixpkgs

pkgs.freeciv

Multiplayer (or single player), turn-based strategy game

nixos-unstable 3.2.2
- nixpkgs-unstable 3.2.2
- nixos-unstable-small 3.2.5
nixos-26.05 3.2.2
- nixos-26.05-small 3.2.2
- nixpkgs-26.05-darwin 3.2.2

pkgs.freeciv_qt

Multiplayer (or single player), turn-based strategy game

nixos-unstable 3.2.2
- nixpkgs-unstable 3.2.2
- nixos-unstable-small 3.2.5
nixos-26.05 3.2.2
- nixos-26.05-small 3.2.2
- nixpkgs-26.05-darwin 3.2.2

pkgs.freeciv_gtk

Multiplayer (or single player), turn-based strategy game

nixos-unstable 3.2.2
- nixpkgs-unstable 3.2.2
- nixos-unstable-small 3.2.5
nixos-26.05 3.2.2
- nixos-26.05-small 3.2.2
- nixpkgs-26.05-darwin 3.2.2

pkgs.freeciv_sdl2

Multiplayer (or single player), turn-based strategy game

nixos-unstable 3.2.2
- nixpkgs-unstable 3.2.2
- nixos-unstable-small 3.2.5
nixos-26.05 3.2.2
- nixos-26.05-small 3.2.2
- nixpkgs-26.05-darwin 3.2.2

Package maintainers

@nbp Nicolas B. Pierron <nixos@nbp.name>

Published

Permalink CVE-2026-90556

8.5 HIGH

CVSS version (CVSS): 4.0
Attack Vector (AV): Local (L)
Attack Complexity (AC): Low (L)
Attack Requirement (AT): None (N)
Privileges Required (PR): None (N)
User Interaction (UI): Passive (P)
Vulnerable System Impact Confidentiality (VC): High (H)
Vulnerable System Impact Integrity (VI): High (H)
Vulnerable System Impact Availability (VA): High (H)
Subsequent System Impact Confidentiality (SC): None (N)
Subsequent System Impact Integrity (SI): None (N)
Subsequent System Impact Availability (SA): None (N)
Modified Attack Vector (MAV): Local (L)
Modified Attack Complexity (MAC): Low (L)
Modified Attack Requirement (MAT): None (N)
Modified Privileges Required (MPR): None (N)
Modified User Interaction (MUI): Passive (P)
Modified Vulnerable System Impact Confidentiality (MVC): High (H)
Modified Vulnerable System Impact Integrity (MVI): High (H)
Modified Vulnerable System Impact Availability (MVA): High (H)
Modified Subsequent System Impact Confidentiality (MSC): Negligible (N)
Modified Subsequent System Impact Integrity (MSI): Negligible (N)
Modified Subsequent System Impact Availability (MSA): Negligible (N)
Safety (S): Not Defined (X)
Automatable (AU): Not Defined (X)
Recovery (R): Not Defined (X)
Value Density (V): Not Defined (X)
Vulnerability Response Effort (RE): Not Defined (X)
Provider Urgency (U): Not Defined (X)
Confidentiality Req. (CR): Not Defined (X)
Integrity Req. (IR): Not Defined (X)
Availability Req. (AR): Not Defined (X)
Exploit Maturity (E): Not Defined (X)

updated 9 hours ago by @LeSuisse Activity log

Created suggestion 17 hours ago
@LeSuisse accepted 9 hours ago
@LeSuisse published on GitHub 9 hours ago

Freeciv before 3.2.6 Heap Buffer Overflow via worklist_load

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.