USN-8292-1 (UBUNTU-CVE-2026-4424)
Vulnerability from osv_ubuntu – Published: 2026-05-21 14:28 – Updated: 2026-05-21 14:28 – Source website
VLAI
Summary
libarchive vulnerabilities
Details
It was discovered that libarchive incorrectly handled certain RAR archives. An attacker could possibly use this issue to cause an out-of-bounds read via a crafted RAR archive, leading to sensitive memory disclosure. (CVE-2026-4424)
It was discovered that libarchive incorrectly handled certain ISO files. An attacker could possibly use this issue to cause incorrect memory allocation via a crafted ISO file, leading to a denial of service. (CVE-2026-4426)
It was discovered that libarchive incorrectly handled block pointer allocation in zisofs on 32-bit systems. An attacker could possibly use this issue to cause a heap buffer overflow via a crafted ISO9660 image, possibly leading to arbitrary code execution. (CVE-2026-5121)
References
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-4424",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4426",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-5121",
"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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"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": "bsdcpio",
"binary_version": "3.1.2-7ubuntu2.8+esm5"
},
{
"binary_name": "bsdtar",
"binary_version": "3.1.2-7ubuntu2.8+esm5"
},
{
"binary_name": "libarchive13",
"binary_version": "3.1.2-7ubuntu2.8+esm5"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "libarchive",
"purl": "pkg:deb/ubuntu/libarchive@3.1.2-7ubuntu2.8+esm5?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.2-7ubuntu2.8+esm5"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2-5ubuntu1",
"3.1.2-7ubuntu1",
"3.1.2-7ubuntu2",
"3.1.2-7ubuntu2.1",
"3.1.2-7ubuntu2.2",
"3.1.2-7ubuntu2.3",
"3.1.2-7ubuntu2.4",
"3.1.2-7ubuntu2.6",
"3.1.2-7ubuntu2.7",
"3.1.2-7ubuntu2.8",
"3.1.2-7ubuntu2.8+esm1",
"3.1.2-7ubuntu2.8+esm3",
"3.1.2-7ubuntu2.8+esm4"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-4424",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4426",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-5121",
"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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "bsdcpio",
"binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
},
{
"binary_name": "bsdtar",
"binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
},
{
"binary_name": "libarchive13",
"binary_version": "3.1.2-11ubuntu0.16.04.8+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "libarchive",
"purl": "pkg:deb/ubuntu/libarchive@3.1.2-11ubuntu0.16.04.8+esm3?arch=source\u0026distro=esm-infra-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.2-11ubuntu0.16.04.8+esm3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.1.2-11build1",
"3.1.2-11ubuntu0.16.04.1",
"3.1.2-11ubuntu0.16.04.2",
"3.1.2-11ubuntu0.16.04.3",
"3.1.2-11ubuntu0.16.04.4",
"3.1.2-11ubuntu0.16.04.5",
"3.1.2-11ubuntu0.16.04.6",
"3.1.2-11ubuntu0.16.04.7",
"3.1.2-11ubuntu0.16.04.8",
"3.1.2-11ubuntu0.16.04.8+esm1",
"3.1.2-11ubuntu0.16.04.8+esm2"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-4424",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4426",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-5121",
"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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"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": "bsdcpio",
"binary_version": "3.2.2-3.1ubuntu0.7+esm3"
},
{
"binary_name": "bsdtar",
"binary_version": "3.2.2-3.1ubuntu0.7+esm3"
},
{
"binary_name": "libarchive-tools",
"binary_version": "3.2.2-3.1ubuntu0.7+esm3"
},
{
"binary_name": "libarchive13",
"binary_version": "3.2.2-3.1ubuntu0.7+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "libarchive",
"purl": "pkg:deb/ubuntu/libarchive@3.2.2-3.1ubuntu0.7+esm3?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.2.2-3.1ubuntu0.7+esm3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.2.2-3.1",
"3.2.2-3.1ubuntu0.1",
"3.2.2-3.1ubuntu0.2",
"3.2.2-3.1ubuntu0.3",
"3.2.2-3.1ubuntu0.4",
"3.2.2-3.1ubuntu0.5",
"3.2.2-3.1ubuntu0.6",
"3.2.2-3.1ubuntu0.7",
"3.2.2-3.1ubuntu0.7+esm1",
"3.2.2-3.1ubuntu0.7+esm2"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-4424",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4426",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-5121",
"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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"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": "libarchive-tools",
"binary_version": "3.4.0-2ubuntu1.5+esm2"
},
{
"binary_name": "libarchive13",
"binary_version": "3.4.0-2ubuntu1.5+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "libarchive",
"purl": "pkg:deb/ubuntu/libarchive@3.4.0-2ubuntu1.5+esm2?arch=source\u0026distro=esm-infra/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.0-2ubuntu1.5+esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.4.0-1",
"3.4.0-1build1",
"3.4.0-1ubuntu2",
"3.4.0-2ubuntu1",
"3.4.0-2ubuntu1.1",
"3.4.0-2ubuntu1.2",
"3.4.0-2ubuntu1.3",
"3.4.0-2ubuntu1.4",
"3.4.0-2ubuntu1.5",
"3.4.0-2ubuntu1.5+esm1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-4424",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4426",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-5121",
"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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libarchive-tools",
"binary_version": "3.6.0-1ubuntu1.7"
},
{
"binary_name": "libarchive13",
"binary_version": "3.6.0-1ubuntu1.7"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "libarchive",
"purl": "pkg:deb/ubuntu/libarchive@3.6.0-1ubuntu1.7?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.0-1ubuntu1.7"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.4.3-2",
"3.4.3-2build1",
"3.5.2-1",
"3.5.2-1ubuntu1",
"3.6.0-1ubuntu1",
"3.6.0-1ubuntu1.1",
"3.6.0-1ubuntu1.2",
"3.6.0-1ubuntu1.3",
"3.6.0-1ubuntu1.4",
"3.6.0-1ubuntu1.5",
"3.6.0-1ubuntu1.6"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-4424",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4426",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-5121",
"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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:24.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libarchive-tools",
"binary_version": "3.7.2-2ubuntu0.7"
},
{
"binary_name": "libarchive13t64",
"binary_version": "3.7.2-2ubuntu0.7"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "libarchive",
"purl": "pkg:deb/ubuntu/libarchive@3.7.2-2ubuntu0.7?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.2-2ubuntu0.7"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.6.2-1ubuntu1",
"3.7.2-1ubuntu1",
"3.7.2-1ubuntu2",
"3.7.2-1.1ubuntu2",
"3.7.2-2",
"3.7.2-2ubuntu0.1",
"3.7.2-2ubuntu0.2",
"3.7.2-2ubuntu0.3",
"3.7.2-2ubuntu0.4",
"3.7.2-2ubuntu0.5",
"3.7.2-2ubuntu0.6"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-4424",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4426",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-5121",
"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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:25.10"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libarchive-tools",
"binary_version": "3.7.7-0ubuntu3.2"
},
{
"binary_name": "libarchive13t64",
"binary_version": "3.7.7-0ubuntu3.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "libarchive",
"purl": "pkg:deb/ubuntu/libarchive@3.7.7-0ubuntu3.2?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.7-0ubuntu3.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.7.7-0ubuntu2",
"3.7.7-0ubuntu2.1",
"3.7.7-0ubuntu2.2",
"3.7.7-0ubuntu3",
"3.7.7-0ubuntu3.1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-4424",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-4426",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-5121",
"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:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:26.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libarchive-tools",
"binary_version": "3.8.5-1ubuntu2.1"
},
{
"binary_name": "libarchive13t64",
"binary_version": "3.8.5-1ubuntu2.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "libarchive",
"purl": "pkg:deb/ubuntu/libarchive@3.8.5-1ubuntu2.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.5-1ubuntu2.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.7.7-0ubuntu3",
"3.8.5-1ubuntu1",
"3.8.5-1ubuntu2"
]
}
],
"aliases": [],
"details": "It was discovered that libarchive incorrectly handled certain RAR\narchives. An attacker could possibly use this issue to cause an\nout-of-bounds read via a crafted RAR archive, leading to sensitive\nmemory disclosure. (CVE-2026-4424)\n\nIt was discovered that libarchive incorrectly handled certain ISO files.\nAn attacker could possibly use this issue to cause incorrect memory\nallocation via a crafted ISO file, leading to a denial of service.\n(CVE-2026-4426)\n\nIt was discovered that libarchive incorrectly handled block pointer\nallocation in zisofs on 32-bit systems. An attacker could possibly use\nthis issue to cause a heap buffer overflow via a crafted ISO9660 image,\npossibly leading to arbitrary code execution. (CVE-2026-5121)",
"id": "USN-8292-1",
"modified": "2026-05-21T14:28:35Z",
"published": "2026-05-21T14:28:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8292-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-4424"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-4426"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-5121"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "libarchive vulnerabilities",
"upstream": [
"UBUNTU-CVE-2026-4424",
"UBUNTU-CVE-2026-4426",
"UBUNTU-CVE-2026-5121"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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