USN-8503-1

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Source
https://ubuntu.com/security/notices/USN-8503-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8503-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8503-1
Upstream
Related
Published
2026-07-02T22:04:04Z
Modified
2026-07-08T18:44:25Z
Summary
ncurses vulnerability
Details

It was discovered that ncurses incorrectly handled certain terminfo entries in the infocmp tool. An attacker could possibly use this issue to cause a denial of service via a crafted terminfo file.

The default compiler options for affected releases should reduce the vulnerability to a denial of service.

References

Affected packages

Ubuntu:Pro:14.04:LTS / ncurses

Package

Name
ncurses
Purl
pkg:deb/ubuntu/ncurses?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.9+20140118-1ubuntu1+esm6

Affected versions

5.*
5.9+20130608-1ubuntu1
5.9+20131221-1ubuntu1
5.9+20140118-1ubuntu1
5.9+20140118-1ubuntu1+esm1
5.9+20140118-1ubuntu1+esm2
5.9+20140118-1ubuntu1+esm3
5.9+20140118-1ubuntu1+esm4
5.9+20140118-1ubuntu1+esm5

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "lib32ncurses5",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "lib32ncursesw5",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "lib32tinfo5",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "lib64ncurses5",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "lib64tinfo5",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "libncurses5",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "libncursesw5",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "libtinfo5",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "libx32ncurses5",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "libx32ncursesw5",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "libx32tinfo5",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "ncurses-base",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "ncurses-bin",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "ncurses-examples",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        },
        {
            "binary_name": "ncurses-term",
            "binary_version": "5.9+20140118-1ubuntu1+esm6"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2025-69720",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:14.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8503-1.json"

Ubuntu:Pro:16.04:LTS / ncurses

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
6.0+20160213-1ubuntu1+esm6

Affected versions

5.*
5.9+20150516-2ubuntu1
6.*
6.0+20151024-2ubuntu1
6.0+20151024-2ubuntu2
6.0+20160213-1ubuntu1
6.0+20160213-1ubuntu1+esm1
6.0+20160213-1ubuntu1+esm2
6.0+20160213-1ubuntu1+esm3
6.0+20160213-1ubuntu1+esm4
6.0+20160213-1ubuntu1+esm5

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "lib32ncurses5",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "lib32ncursesw5",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "lib32tinfo5",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "lib64ncurses5",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "lib64tinfo5",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "libncurses5",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "libncursesw5",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "libtinfo5",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "libx32ncurses5",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "libx32ncursesw5",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "libx32tinfo5",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "ncurses-base",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "ncurses-bin",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "ncurses-examples",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        },
        {
            "binary_name": "ncurses-term",
            "binary_version": "6.0+20160213-1ubuntu1+esm6"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2025-69720",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:16.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8503-1.json"

Ubuntu:Pro:18.04:LTS / ncurses

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
6.1-1ubuntu1.18.04.1+esm3

Affected versions

6.*
6.0+20160625-1ubuntu1
6.0+20171125-1ubuntu1
6.1-1ubuntu1
6.1-1ubuntu1.18.04
6.1-1ubuntu1.18.04.1
6.1-1ubuntu1.18.04.1+esm1
6.1-1ubuntu1.18.04.1+esm2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "lib32ncurses5",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "lib32ncursesw5",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "lib32tinfo5",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "lib64ncurses5",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "lib64tinfo5",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "libncurses5",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "libncursesw5",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "libtinfo5",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "libx32ncurses5",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "libx32ncursesw5",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "libx32tinfo5",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "ncurses-base",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "ncurses-bin",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "ncurses-examples",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        },
        {
            "binary_name": "ncurses-term",
            "binary_version": "6.1-1ubuntu1.18.04.1+esm3"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2025-69720",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:18.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8503-1.json"

Ubuntu:Pro:20.04:LTS / ncurses

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
6.2-0ubuntu2.1+esm1

Affected versions

6.*
6.1+20190803-1ubuntu1
6.1+20191019-1ubuntu1
6.2-0ubuntu2
6.2-0ubuntu2.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "lib32ncurses6",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "lib32ncursesw6",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "lib32tinfo6",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "lib64ncurses6",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "lib64ncursesw6",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "lib64tinfo6",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "libncurses5",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "libncurses6",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "libncursesw5",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "libncursesw6",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "libtinfo5",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "libtinfo6",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "ncurses-base",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "ncurses-bin",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "ncurses-examples",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        },
        {
            "binary_name": "ncurses-term",
            "binary_version": "6.2-0ubuntu2.1+esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2025-69720",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8503-1.json"