USN-7954-1

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Source
https://ubuntu.com/security/notices/USN-7954-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-7954-1
Upstream
Related
Published
2026-01-12T13:52:51.818425Z
Modified
2026-01-20T20:41:59.625825Z
Summary
libtasn1-6 vulnerabilities
Details

It was discovered that Libtasn1 incorrectly handled decoding ASN.1 content. An attacker could possibly use this issue to cause Libtasn1 to crash, resulting in a denial of service. (CVE-2025-13151)

It was discovered that Libtasn1 incorrectly handled encoding ASN.1 content. An attacker could possibly use this issue to cause Libtasn1 to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2021-46848)

References

Affected packages

Ubuntu:22.04:LTS / libtasn1-6

Package

Name
libtasn1-6
Purl
pkg:deb/ubuntu/libtasn1-6@4.18.0-4ubuntu0.2?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.18.0-4ubuntu0.2

Affected versions

4.*

4.16.0-2
4.16.0-2build1
4.17.0-2
4.18.0-3
4.18.0-4
4.18.0-4build1
4.18.0-4ubuntu0.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "4.18.0-4ubuntu0.2",
            "binary_name": "libtasn1-6"
        },
        {
            "binary_version": "4.18.0-4ubuntu0.2",
            "binary_name": "libtasn1-6-dev"
        },
        {
            "binary_version": "4.18.0-4ubuntu0.2",
            "binary_name": "libtasn1-bin"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-1.json"

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-46848",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "low",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2025-13151",
            "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:22.04:LTS"
}

Ubuntu:24.04:LTS / libtasn1-6

Package

Name
libtasn1-6
Purl
pkg:deb/ubuntu/libtasn1-6@4.19.0-3ubuntu0.24.04.2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.19.0-3ubuntu0.24.04.2

Affected versions

4.*

4.19.0-3
4.19.0-3build1
4.19.0-3ubuntu0.24.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "4.19.0-3ubuntu0.24.04.2",
            "binary_name": "libtasn1-6"
        },
        {
            "binary_version": "4.19.0-3ubuntu0.24.04.2",
            "binary_name": "libtasn1-6-dev"
        },
        {
            "binary_version": "4.19.0-3ubuntu0.24.04.2",
            "binary_name": "libtasn1-bin"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-1.json"

cves_map

{
    "cves": [
        {
            "id": "CVE-2025-13151",
            "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:24.04:LTS"
}

Ubuntu:25.10 / libtasn1-6

Package

Name
libtasn1-6
Purl
pkg:deb/ubuntu/libtasn1-6@4.20.0-2ubuntu0.25.10.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.20.0-2ubuntu0.25.10.1

Affected versions

4.*

4.20.0-2
4.20.0-2build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "4.20.0-2ubuntu0.25.10.1",
            "binary_name": "libtasn1-6"
        },
        {
            "binary_version": "4.20.0-2ubuntu0.25.10.1",
            "binary_name": "libtasn1-6-dev"
        },
        {
            "binary_version": "4.20.0-2ubuntu0.25.10.1",
            "binary_name": "libtasn1-bin"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-1.json"

cves_map

{
    "cves": [
        {
            "id": "CVE-2025-13151",
            "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:25.10"
}