USN-7954-2

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Source
https://ubuntu.com/security/notices/USN-7954-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-2.json
JSON Data
https://api.osv.dev/v1/vulns/USN-7954-2
Upstream
Related
Published
2026-02-10T19:24:41Z
Modified
2026-02-12T06:44:01.528958Z
Summary
libtasn1-6 vulnerabilities
Details

USN-7954-1 fixed vulnerabilities in Libtasn1. This update provides the corresponding updates for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. CVE-2021-46848 only affected Ubuntu 14.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.

Original advisory 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:Pro:14.04:LTS / libtasn1-6

Package

Name
libtasn1-6
Purl
pkg:deb/ubuntu/libtasn1-6@3.4-3ubuntu0.6+esm1?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.4-3ubuntu0.6+esm1

Affected versions

3.*
3.3-2
3.4-2
3.4-3
3.4-3ubuntu0.1
3.4-3ubuntu0.2
3.4-3ubuntu0.3
3.4-3ubuntu0.4
3.4-3ubuntu0.5
3.4-3ubuntu0.6

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "3.4-3ubuntu0.6+esm1",
            "binary_name": "libtasn1-3-bin"
        },
        {
            "binary_version": "3.4-3ubuntu0.6+esm1",
            "binary_name": "libtasn1-3-dev"
        },
        {
            "binary_version": "3.4-3ubuntu0.6+esm1",
            "binary_name": "libtasn1-6"
        },
        {
            "binary_version": "3.4-3ubuntu0.6+esm1",
            "binary_name": "libtasn1-6-dev"
        },
        {
            "binary_version": "3.4-3ubuntu0.6+esm1",
            "binary_name": "libtasn1-bin"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:14.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-46848",
            "severity": [
                {
                    "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": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "low"
                }
            ]
        },
        {
            "id": "CVE-2025-13151",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:Pro:16.04:LTS / libtasn1-6

Package

Name
libtasn1-6
Purl
pkg:deb/ubuntu/libtasn1-6@4.7-3ubuntu0.16.04.3+esm4?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.7-3ubuntu0.16.04.3+esm4

Affected versions

4.*
4.5-2
4.7-2
4.7-3
4.7-3ubuntu0.16.04.1
4.7-3ubuntu0.16.04.2
4.7-3ubuntu0.16.04.3
4.7-3ubuntu0.16.04.3+esm2
4.7-3ubuntu0.16.04.3+esm3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "4.7-3ubuntu0.16.04.3+esm4",
            "binary_name": "libtasn1-3-bin"
        },
        {
            "binary_version": "4.7-3ubuntu0.16.04.3+esm4",
            "binary_name": "libtasn1-6"
        },
        {
            "binary_version": "4.7-3ubuntu0.16.04.3+esm4",
            "binary_name": "libtasn1-6-dev"
        },
        {
            "binary_version": "4.7-3ubuntu0.16.04.3+esm4",
            "binary_name": "libtasn1-bin"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": [
        {
            "id": "CVE-2025-13151",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:Pro:18.04:LTS / libtasn1-6

Package

Name
libtasn1-6
Purl
pkg:deb/ubuntu/libtasn1-6@4.13-2ubuntu0.1~esm1?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.13-2ubuntu0.1~esm1

Affected versions

4.*
4.12-2.1
4.12-3
4.13-2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "4.13-2ubuntu0.1~esm1",
            "binary_name": "libtasn1-6"
        },
        {
            "binary_version": "4.13-2ubuntu0.1~esm1",
            "binary_name": "libtasn1-6-dev"
        },
        {
            "binary_version": "4.13-2ubuntu0.1~esm1",
            "binary_name": "libtasn1-bin"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:18.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-46848",
            "severity": [
                {
                    "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": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "low"
                }
            ]
        },
        {
            "id": "CVE-2025-13151",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:Pro:20.04:LTS / libtasn1-6

Package

Name
libtasn1-6
Purl
pkg:deb/ubuntu/libtasn1-6@4.16.0-2ubuntu0.1+esm1?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.16.0-2ubuntu0.1+esm1

Affected versions

4.*
4.14-3
4.15.0-2
4.16.0-2
4.16.0-2ubuntu0.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "4.16.0-2ubuntu0.1+esm1",
            "binary_name": "libtasn1-6"
        },
        {
            "binary_version": "4.16.0-2ubuntu0.1+esm1",
            "binary_name": "libtasn1-6-dev"
        },
        {
            "binary_version": "4.16.0-2ubuntu0.1+esm1",
            "binary_name": "libtasn1-bin"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "id": "CVE-2021-46848",
            "severity": [
                {
                    "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": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "low"
                }
            ]
        },
        {
            "id": "CVE-2025-13151",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}