USN-8025-1

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Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-8025-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8025-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8025-1
Upstream
Related
Published
2026-02-11T14:25:40Z
Modified
2026-04-27T18:37:53.634678Z
Summary
dotnet8, dotnet9, dotnet10 vulnerability
Details

Kevin Jones discovered that the System.Security.Cryptography.Cose component in .NET did not properly handle certain missing special elements in input data. An attacker could possibly use this issue to bypass security checks and gain unauthorized access or perform data manipulation.

References

Affected packages

Ubuntu:22.04:LTS / dotnet8

Package

Name
dotnet8
Purl
pkg:deb/ubuntu/dotnet8@8.0.124-8.0.24-0ubuntu1~22.04.1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
8.0.124-8.0.24-0ubuntu1~22.04.1

Affected versions

8.*
8.0.102-8.0.2-0ubuntu1~22.04.1
8.0.103-8.0.3-0ubuntu1~22.04.1
8.0.103-8.0.3-0ubuntu1~22.04.2
8.0.105-8.0.5-0ubuntu1~22.04.1
8.0.107-8.0.7-0ubuntu1~22.04.1
8.0.108-8.0.8-0ubuntu1~22.04.1
8.0.110-8.0.10-0ubuntu1~22.04.1
8.0.111-8.0.11-0ubuntu1~22.04.1
8.0.112-8.0.12-0ubuntu1~22.04.1
8.0.114-8.0.14-0ubuntu1~22.04.1
8.0.115-8.0.15-0ubuntu1~22.04.1
8.0.116-8.0.16-0ubuntu1~22.04.1
8.0.117-8.0.17-0ubuntu1~22.04.1
8.0.118-8.0.18-0ubuntu1~22.04.1
8.0.119-8.0.19-0ubuntu1~22.04.1
8.0.120-8.0.20-0ubuntu1~22.04.1
8.0.121-8.0.21-0ubuntu1~22.04.1
8.0.122-8.0.22-0ubuntu1~22.04.1
8.0.123-8.0.23-0ubuntu1~22.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "8.0.24-0ubuntu1~22.04.1",
            "binary_name": "aspnetcore-runtime-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~22.04.1",
            "binary_name": "aspnetcore-runtime-dbg-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~22.04.1",
            "binary_name": "aspnetcore-targeting-pack-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~22.04.1",
            "binary_name": "dotnet-apphost-pack-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~22.04.1",
            "binary_name": "dotnet-host-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~22.04.1",
            "binary_name": "dotnet-hostfxr-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~22.04.1",
            "binary_name": "dotnet-runtime-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~22.04.1",
            "binary_name": "dotnet-runtime-dbg-8.0"
        },
        {
            "binary_version": "8.0.124-0ubuntu1~22.04.1",
            "binary_name": "dotnet-sdk-8.0"
        },
        {
            "binary_version": "8.0.124-0ubuntu1~22.04.1",
            "binary_name": "dotnet-sdk-8.0-source-built-artifacts"
        },
        {
            "binary_version": "8.0.124-0ubuntu1~22.04.1",
            "binary_name": "dotnet-sdk-dbg-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~22.04.1",
            "binary_name": "dotnet-targeting-pack-8.0"
        },
        {
            "binary_version": "8.0.124-0ubuntu1~22.04.1",
            "binary_name": "dotnet-templates-8.0"
        },
        {
            "binary_version": "8.0.124-8.0.24-0ubuntu1~22.04.1",
            "binary_name": "dotnet8"
        },
        {
            "binary_version": "8.0.124-0ubuntu1~22.04.1",
            "binary_name": "netstandard-targeting-pack-2.1-8.0"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8025-1.json"
cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-21218"
        }
    ],
    "ecosystem": "Ubuntu:22.04:LTS"
}

Ubuntu:25.10 / dotnet10

Package

Name
dotnet10
Purl
pkg:deb/ubuntu/dotnet10@10.0.103-10.0.3-0ubuntu1~25.10.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
10.0.103-10.0.3-0ubuntu1~25.10.1

Affected versions

10.*
10.0.100-10.0.0~rc1-0ubuntu1
10.0.100-10.0.0~rc2-0ubuntu1~25.10.2
10.0.100-10.0.0-0ubuntu1~25.10.1
10.0.101-10.0.1-0ubuntu1~25.10.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "10.0.3-0ubuntu1~25.10.1",
            "binary_name": "aspnetcore-runtime-10.0"
        },
        {
            "binary_version": "10.0.3-0ubuntu1~25.10.1",
            "binary_name": "aspnetcore-runtime-dbg-10.0"
        },
        {
            "binary_version": "10.0.3-0ubuntu1~25.10.1",
            "binary_name": "aspnetcore-targeting-pack-10.0"
        },
        {
            "binary_version": "10.0.3-0ubuntu1~25.10.1",
            "binary_name": "dotnet-apphost-pack-10.0"
        },
        {
            "binary_version": "10.0.3-0ubuntu1~25.10.1",
            "binary_name": "dotnet-host-10.0"
        },
        {
            "binary_version": "10.0.3-0ubuntu1~25.10.1",
            "binary_name": "dotnet-hostfxr-10.0"
        },
        {
            "binary_version": "10.0.3-0ubuntu1~25.10.1",
            "binary_name": "dotnet-runtime-10.0"
        },
        {
            "binary_version": "10.0.3-0ubuntu1~25.10.1",
            "binary_name": "dotnet-runtime-dbg-10.0"
        },
        {
            "binary_version": "10.0.103-0ubuntu1~25.10.1",
            "binary_name": "dotnet-sdk-10.0"
        },
        {
            "binary_version": "10.0.103-0ubuntu1~25.10.1",
            "binary_name": "dotnet-sdk-10.0-source-built-artifacts"
        },
        {
            "binary_version": "10.0.103-0ubuntu1~25.10.1",
            "binary_name": "dotnet-sdk-aot-10.0"
        },
        {
            "binary_version": "10.0.103-0ubuntu1~25.10.1",
            "binary_name": "dotnet-sdk-dbg-10.0"
        },
        {
            "binary_version": "10.0.3-0ubuntu1~25.10.1",
            "binary_name": "dotnet-targeting-pack-10.0"
        },
        {
            "binary_version": "10.0.103-0ubuntu1~25.10.1",
            "binary_name": "dotnet-templates-10.0"
        },
        {
            "binary_version": "10.0.103-10.0.3-0ubuntu1~25.10.1",
            "binary_name": "dotnet10"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8025-1.json"
cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-21218"
        }
    ],
    "ecosystem": "Ubuntu:25.10"
}

Ubuntu:25.10 / dotnet8

Package

Name
dotnet8
Purl
pkg:deb/ubuntu/dotnet8@8.0.124-8.0.24-0ubuntu1~25.10.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
8.0.124-8.0.24-0ubuntu1~25.10.1

Affected versions

8.*
8.0.115-8.0.15-0ubuntu1
8.0.116-8.0.16-0ubuntu1
8.0.117-8.0.17-0ubuntu1
8.0.118-8.0.18-0ubuntu1
8.0.119-8.0.19-0ubuntu1
8.0.120-8.0.20-0ubuntu1
8.0.121-8.0.21-0ubuntu1~25.10.1
8.0.122-8.0.22-0ubuntu1~25.10.1
8.0.123-8.0.23-0ubuntu1~25.10.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "8.0.24-0ubuntu1~25.10.1",
            "binary_name": "aspnetcore-runtime-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~25.10.1",
            "binary_name": "aspnetcore-runtime-dbg-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~25.10.1",
            "binary_name": "aspnetcore-targeting-pack-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~25.10.1",
            "binary_name": "dotnet-apphost-pack-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~25.10.1",
            "binary_name": "dotnet-host-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~25.10.1",
            "binary_name": "dotnet-hostfxr-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~25.10.1",
            "binary_name": "dotnet-runtime-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~25.10.1",
            "binary_name": "dotnet-runtime-dbg-8.0"
        },
        {
            "binary_version": "8.0.124-0ubuntu1~25.10.1",
            "binary_name": "dotnet-sdk-8.0"
        },
        {
            "binary_version": "8.0.124-0ubuntu1~25.10.1",
            "binary_name": "dotnet-sdk-8.0-source-built-artifacts"
        },
        {
            "binary_version": "8.0.124-0ubuntu1~25.10.1",
            "binary_name": "dotnet-sdk-dbg-8.0"
        },
        {
            "binary_version": "8.0.24-0ubuntu1~25.10.1",
            "binary_name": "dotnet-targeting-pack-8.0"
        },
        {
            "binary_version": "8.0.124-0ubuntu1~25.10.1",
            "binary_name": "dotnet-templates-8.0"
        },
        {
            "binary_version": "8.0.124-8.0.24-0ubuntu1~25.10.1",
            "binary_name": "dotnet8"
        },
        {
            "binary_version": "8.0.124-0ubuntu1~25.10.1",
            "binary_name": "netstandard-targeting-pack-2.1-8.0"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8025-1.json"
cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-21218"
        }
    ],
    "ecosystem": "Ubuntu:25.10"
}

Ubuntu:25.10 / dotnet9

Package

Name
dotnet9
Purl
pkg:deb/ubuntu/dotnet9@9.0.114-9.0.13-0ubuntu1~25.10.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
9.0.114-9.0.13-0ubuntu1~25.10.1

Affected versions

9.*
9.0.105-9.0.4-0ubuntu1
9.0.106-9.0.5-0ubuntu1
9.0.107-9.0.6-0ubuntu1
9.0.108-9.0.7-0ubuntu1
9.0.109-9.0.8-0ubuntu1
9.0.110-9.0.9-0ubuntu1
9.0.111-9.0.10-0ubuntu1~25.10.1
9.0.112-9.0.11-0ubuntu1~25.10.1
9.0.113-9.0.12-0ubuntu1~25.10.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "9.0.13-0ubuntu1~25.10.1",
            "binary_name": "aspnetcore-runtime-9.0"
        },
        {
            "binary_version": "9.0.13-0ubuntu1~25.10.1",
            "binary_name": "aspnetcore-runtime-dbg-9.0"
        },
        {
            "binary_version": "9.0.13-0ubuntu1~25.10.1",
            "binary_name": "aspnetcore-targeting-pack-9.0"
        },
        {
            "binary_version": "9.0.13-0ubuntu1~25.10.1",
            "binary_name": "dotnet-apphost-pack-9.0"
        },
        {
            "binary_version": "9.0.13-0ubuntu1~25.10.1",
            "binary_name": "dotnet-host-9.0"
        },
        {
            "binary_version": "9.0.13-0ubuntu1~25.10.1",
            "binary_name": "dotnet-hostfxr-9.0"
        },
        {
            "binary_version": "9.0.13-0ubuntu1~25.10.1",
            "binary_name": "dotnet-runtime-9.0"
        },
        {
            "binary_version": "9.0.13-0ubuntu1~25.10.1",
            "binary_name": "dotnet-runtime-dbg-9.0"
        },
        {
            "binary_version": "9.0.114-0ubuntu1~25.10.1",
            "binary_name": "dotnet-sdk-9.0"
        },
        {
            "binary_version": "9.0.114-0ubuntu1~25.10.1",
            "binary_name": "dotnet-sdk-9.0-source-built-artifacts"
        },
        {
            "binary_version": "9.0.114-0ubuntu1~25.10.1",
            "binary_name": "dotnet-sdk-aot-9.0"
        },
        {
            "binary_version": "9.0.114-0ubuntu1~25.10.1",
            "binary_name": "dotnet-sdk-dbg-9.0"
        },
        {
            "binary_version": "9.0.13-0ubuntu1~25.10.1",
            "binary_name": "dotnet-targeting-pack-9.0"
        },
        {
            "binary_version": "9.0.114-0ubuntu1~25.10.1",
            "binary_name": "dotnet-templates-9.0"
        },
        {
            "binary_version": "9.0.114-9.0.13-0ubuntu1~25.10.1",
            "binary_name": "dotnet9"
        },
        {
            "binary_version": "9.0.114-0ubuntu1~25.10.1",
            "binary_name": "netstandard-targeting-pack-2.1-9.0"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8025-1.json"
cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-21218"
        }
    ],
    "ecosystem": "Ubuntu:25.10"
}