usn-7954-2
Vulnerability from osv_ubuntu
Published
2026-02-10 19:24
Modified
2026-06-25 10:47
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
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"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:Pro:14.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libtasn1-3-bin",
"binary_version": "3.4-3ubuntu0.6+esm1"
},
{
"binary_name": "libtasn1-6",
"binary_version": "3.4-3ubuntu0.6+esm1"
},
{
"binary_name": "libtasn1-bin",
"binary_version": "3.4-3ubuntu0.6+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "libtasn1-6",
"purl": "pkg:deb/ubuntu/libtasn1-6@3.4-3ubuntu0.6+esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4-3ubuntu0.6+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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"
]
},
{
"database_specific": {
"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:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"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-bin",
"binary_version": "4.7-3ubuntu0.16.04.3+esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "libtasn1-6",
"purl": "pkg:deb/ubuntu/libtasn1-6@4.7-3ubuntu0.16.04.3+esm4?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.7-3ubuntu0.16.04.3+esm4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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"
]
},
{
"database_specific": {
"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:Pro:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libtasn1-6",
"binary_version": "4.13-2ubuntu0.1~esm1"
},
{
"binary_name": "libtasn1-bin",
"binary_version": "4.13-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "libtasn1-6",
"purl": "pkg:deb/ubuntu/libtasn1-6@4.13-2ubuntu0.1~esm1?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.13-2ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.12-2.1",
"4.12-3",
"4.13-2"
]
},
{
"database_specific": {
"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:Pro:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libtasn1-6",
"binary_version": "4.16.0-2ubuntu0.1+esm1"
},
{
"binary_name": "libtasn1-bin",
"binary_version": "4.16.0-2ubuntu0.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "libtasn1-6",
"purl": "pkg:deb/ubuntu/libtasn1-6@4.16.0-2ubuntu0.1+esm1?arch=source\u0026distro=esm-infra/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.16.0-2ubuntu0.1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.14-3",
"4.15.0-2",
"4.16.0-2",
"4.16.0-2ubuntu0.1"
]
}
],
"aliases": [],
"details": "USN-7954-1 fixed vulnerabilities in Libtasn1. This update provides the\ncorresponding updates for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu\n18.04 LTS, and Ubuntu 20.04 LTS. CVE-2021-46848 only affected Ubuntu\n14.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.\n\nOriginal advisory details:\n\n It was discovered that Libtasn1 incorrectly handled decoding ASN.1\n content. An attacker could possibly use this issue to cause Libtasn1 to\n crash, resulting in a denial of service. (CVE-2025-13151)\n\n It was discovered that Libtasn1 incorrectly handled encoding ASN.1\n content. An attacker could possibly use this issue to cause Libtasn1 to\n crash, resulting in a denial of service. This issue only affected\n Ubuntu 22.04 LTS. (CVE-2021-46848)",
"id": "USN-7954-2",
"modified": "2026-06-25T10:47:02Z",
"published": "2026-02-10T19:24:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-7954-2"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-46848"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-13151"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "libtasn1-6 vulnerabilities",
"upstream": [
"UBUNTU-CVE-2021-46848",
"UBUNTU-CVE-2025-13151"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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