UBUNTU-CVE-2026-90557

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Source

https://ubuntu.com/security/CVE-2026-90557

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90557.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-90557

Upstream

CVE-2026-90557

Published

2026-09-14T00:00:00Z

Modified

2026-09-14T11:18:28Z

Severity

6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVSS Calculator
6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

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

Affected packages

Ubuntu:16.04:LTS

freeciv

Package

Name: freeciv
Purl: pkg:deb/ubuntu/freeciv?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.5.1-1

2.5.2-1

2.5.3-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "freeciv",
            "binary_version": "2.5.3-1"
        },
        {
            "binary_name": "freeciv-client-extras",
            "binary_version": "2.5.3-1"
        },
        {
            "binary_name": "freeciv-client-gtk",
            "binary_version": "2.5.3-1"
        },
        {
            "binary_name": "freeciv-client-qt",
            "binary_version": "2.5.3-1"
        },
        {
            "binary_name": "freeciv-client-sdl",
            "binary_version": "2.5.3-1"
        },
        {
            "binary_name": "freeciv-data",
            "binary_version": "2.5.3-1"
        },
        {
            "binary_name": "freeciv-server",
            "binary_version": "2.5.3-1"
        },
        {
            "binary_name": "freeciv-sound-standard",
            "binary_version": "2.5.3-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90557.json"

Ubuntu:18.04:LTS

freeciv

Package

Name: freeciv
Purl: pkg:deb/ubuntu/freeciv?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.5.9-1

2.5.10-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "freeciv",
            "binary_version": "2.5.10-1"
        },
        {
            "binary_name": "freeciv-client-extras",
            "binary_version": "2.5.10-1"
        },
        {
            "binary_name": "freeciv-client-gtk",
            "binary_version": "2.5.10-1"
        },
        {
            "binary_name": "freeciv-client-gtk3",
            "binary_version": "2.5.10-1"
        },
        {
            "binary_name": "freeciv-client-qt",
            "binary_version": "2.5.10-1"
        },
        {
            "binary_name": "freeciv-client-sdl",
            "binary_version": "2.5.10-1"
        },
        {
            "binary_name": "freeciv-data",
            "binary_version": "2.5.10-1"
        },
        {
            "binary_name": "freeciv-server",
            "binary_version": "2.5.10-1"
        },
        {
            "binary_name": "freeciv-sound-standard",
            "binary_version": "2.5.10-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90557.json"

Ubuntu:20.04:LTS

freeciv

Package

Name: freeciv
Purl: pkg:deb/ubuntu/freeciv?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.6.0-3

2.6.0-4

2.6.1-1

2.6.2-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "freeciv",
            "binary_version": "2.6.2-1"
        },
        {
            "binary_name": "freeciv-client-extras",
            "binary_version": "2.6.2-1"
        },
        {
            "binary_name": "freeciv-client-gtk",
            "binary_version": "2.6.2-1"
        },
        {
            "binary_name": "freeciv-client-gtk3",
            "binary_version": "2.6.2-1"
        },
        {
            "binary_name": "freeciv-client-qt",
            "binary_version": "2.6.2-1"
        },
        {
            "binary_name": "freeciv-client-sdl",
            "binary_version": "2.6.2-1"
        },
        {
            "binary_name": "freeciv-data",
            "binary_version": "2.6.2-1"
        },
        {
            "binary_name": "freeciv-server",
            "binary_version": "2.6.2-1"
        },
        {
            "binary_name": "freeciv-sound-standard",
            "binary_version": "2.6.2-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90557.json"

Ubuntu:22.04:LTS

freeciv

Package

Name: freeciv
Purl: pkg:deb/ubuntu/freeciv?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.6.3-1

2.6.5-1

2.6.6-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "freeciv",
            "binary_version": "2.6.6-1"
        },
        {
            "binary_name": "freeciv-client-extras",
            "binary_version": "2.6.6-1"
        },
        {
            "binary_name": "freeciv-client-gtk",
            "binary_version": "2.6.6-1"
        },
        {
            "binary_name": "freeciv-client-gtk3",
            "binary_version": "2.6.6-1"
        },
        {
            "binary_name": "freeciv-client-qt",
            "binary_version": "2.6.6-1"
        },
        {
            "binary_name": "freeciv-client-sdl",
            "binary_version": "2.6.6-1"
        },
        {
            "binary_name": "freeciv-data",
            "binary_version": "2.6.6-1"
        },
        {
            "binary_name": "freeciv-server",
            "binary_version": "2.6.6-1"
        },
        {
            "binary_name": "freeciv-sound-standard",
            "binary_version": "2.6.6-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90557.json"

Ubuntu:24.04:LTS

freeciv

Package

Name: freeciv
Purl: pkg:deb/ubuntu/freeciv?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.0.8-1

3.0.8-2

3.0.8-2build1

3.1.0+ds-1build3

3.1.0+ds-1build4

3.1.0+ds-1build5

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "freeciv",
            "binary_version": "3.1.0+ds-1build5"
        },
        {
            "binary_name": "freeciv-client-extras",
            "binary_version": "3.1.0+ds-1build5"
        },
        {
            "binary_name": "freeciv-client-gtk3",
            "binary_version": "3.1.0+ds-1build5"
        },
        {
            "binary_name": "freeciv-client-qt",
            "binary_version": "3.1.0+ds-1build5"
        },
        {
            "binary_name": "freeciv-client-sdl",
            "binary_version": "3.1.0+ds-1build5"
        },
        {
            "binary_name": "freeciv-data",
            "binary_version": "3.1.0+ds-1build5"
        },
        {
            "binary_name": "freeciv-ruleset-tools",
            "binary_version": "3.1.0+ds-1build5"
        },
        {
            "binary_name": "freeciv-server",
            "binary_version": "3.1.0+ds-1build5"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90557.json"

Ubuntu:26.04:LTS

freeciv

Package

Name: freeciv
Purl: pkg:deb/ubuntu/freeciv?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.2.0+ds-1

3.2.1+ds-1

3.2.1+ds-1build1

3.2.2+ds-1

3.2.4+ds-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "freeciv",
            "binary_version": "3.2.4+ds-1"
        },
        {
            "binary_name": "freeciv-client-extras",
            "binary_version": "3.2.4+ds-1"
        },
        {
            "binary_name": "freeciv-client-gtk3",
            "binary_version": "3.2.4+ds-1"
        },
        {
            "binary_name": "freeciv-client-gtk4",
            "binary_version": "3.2.4+ds-1"
        },
        {
            "binary_name": "freeciv-client-qt",
            "binary_version": "3.2.4+ds-1"
        },
        {
            "binary_name": "freeciv-client-sdl",
            "binary_version": "3.2.4+ds-1"
        },
        {
            "binary_name": "freeciv-data",
            "binary_version": "3.2.4+ds-1"
        },
        {
            "binary_name": "freeciv-ruleset-tools",
            "binary_version": "3.2.4+ds-1"
        },
        {
            "binary_name": "freeciv-server",
            "binary_version": "3.2.4+ds-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90557.json"