USN-8754-1

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Source
https://ubuntu.com/security/notices/USN-8754-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8754-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8754-1
Upstream
Related
Published
2026-09-14T12:40:26Z
Modified
2026-09-14T22:12:16Z
Summary
freeciv vulnerability
Details

It was discovered that Freeciv incorrectly handled certain network packets, resulting in a stack overflow. A remote attacker could possibly use this issue to cause Freeciv clients or servers to crash, resulting in a denial of service.

References

Affected packages

Ubuntu:Pro:16.04:LTS / freeciv

Package

Name
freeciv
Purl
pkg:deb/ubuntu/freeciv?arch=source&distro=esm-apps-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.5.3-1ubuntu0.1~esm1

Affected versions

2.*
2.5.1-1
2.5.2-1
2.5.3-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "freeciv",
            "binary_version": "2.5.3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-extras",
            "binary_version": "2.5.3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-gtk",
            "binary_version": "2.5.3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-qt",
            "binary_version": "2.5.3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-sdl",
            "binary_version": "2.5.3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-data",
            "binary_version": "2.5.3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-server",
            "binary_version": "2.5.3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-sound-standard",
            "binary_version": "2.5.3-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-33250",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:16.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8754-1.json"

Ubuntu:Pro:18.04:LTS / freeciv

Package

Name
freeciv
Purl
pkg:deb/ubuntu/freeciv?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.5.10-1ubuntu0.1~esm1

Affected versions

2.*
2.5.9-1
2.5.10-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "freeciv",
            "binary_version": "2.5.10-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-extras",
            "binary_version": "2.5.10-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-gtk",
            "binary_version": "2.5.10-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-gtk3",
            "binary_version": "2.5.10-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-qt",
            "binary_version": "2.5.10-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-sdl",
            "binary_version": "2.5.10-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-data",
            "binary_version": "2.5.10-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-server",
            "binary_version": "2.5.10-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-sound-standard",
            "binary_version": "2.5.10-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-33250",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:18.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8754-1.json"

Ubuntu:Pro:20.04:LTS / freeciv

Package

Name
freeciv
Purl
pkg:deb/ubuntu/freeciv?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.6.2-1ubuntu0.1~esm1

Affected versions

2.*
2.6.0-3
2.6.0-4
2.6.1-1
2.6.2-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "freeciv",
            "binary_version": "2.6.2-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-extras",
            "binary_version": "2.6.2-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-gtk",
            "binary_version": "2.6.2-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-gtk3",
            "binary_version": "2.6.2-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-qt",
            "binary_version": "2.6.2-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-sdl",
            "binary_version": "2.6.2-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-data",
            "binary_version": "2.6.2-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-server",
            "binary_version": "2.6.2-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-sound-standard",
            "binary_version": "2.6.2-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-33250",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8754-1.json"

Ubuntu:Pro:22.04:LTS / freeciv

Package

Name
freeciv
Purl
pkg:deb/ubuntu/freeciv?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.6.6-1ubuntu0.1~esm1

Affected versions

2.*
2.6.3-1
2.6.5-1
2.6.6-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "freeciv",
            "binary_version": "2.6.6-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-extras",
            "binary_version": "2.6.6-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-gtk",
            "binary_version": "2.6.6-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-gtk3",
            "binary_version": "2.6.6-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-qt",
            "binary_version": "2.6.6-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-sdl",
            "binary_version": "2.6.6-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-data",
            "binary_version": "2.6.6-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-server",
            "binary_version": "2.6.6-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-sound-standard",
            "binary_version": "2.6.6-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-33250",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8754-1.json"

Ubuntu:Pro:24.04:LTS / freeciv

Package

Name
freeciv
Purl
pkg:deb/ubuntu/freeciv?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.1.0+ds-1ubuntu0.1~esm1

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 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "freeciv",
            "binary_version": "3.1.0+ds-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-extras",
            "binary_version": "3.1.0+ds-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-gtk3",
            "binary_version": "3.1.0+ds-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-qt",
            "binary_version": "3.1.0+ds-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-client-sdl",
            "binary_version": "3.1.0+ds-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-data",
            "binary_version": "3.1.0+ds-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-ruleset-tools",
            "binary_version": "3.1.0+ds-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "freeciv-server",
            "binary_version": "3.1.0+ds-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-33250",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8754-1.json"