usn-8685-1
Vulnerability from osv_ubuntu
Published
2026-08-27 11:18
Modified
2026-09-01 05:37
Summary
bzip2 vulnerability
Details
It was discovered that bzip2 did not properly manage memory under certain circumstances. An attacker could possibly use this issue to cause a crash, resulting in a denial of service.
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-42250",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "low",
"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": "bzip2",
"binary_version": "1.0.6-5ubuntu0.1~esm3"
},
{
"binary_name": "lib32bz2-1.0",
"binary_version": "1.0.6-5ubuntu0.1~esm3"
},
{
"binary_name": "lib64bz2-1.0",
"binary_version": "1.0.6-5ubuntu0.1~esm3"
},
{
"binary_name": "libbz2-1.0",
"binary_version": "1.0.6-5ubuntu0.1~esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "bzip2",
"purl": "pkg:deb/ubuntu/bzip2@1.0.6-5ubuntu0.1~esm3?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.6-5ubuntu0.1~esm3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.6-4",
"1.0.6-5",
"1.0.6-5ubuntu0.1~esm1",
"1.0.6-5ubuntu0.1~esm2"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-42250",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "low",
"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": "bzip2",
"binary_version": "1.0.6-8ubuntu0.2+esm1"
},
{
"binary_name": "libbz2-1.0",
"binary_version": "1.0.6-8ubuntu0.2+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "bzip2",
"purl": "pkg:deb/ubuntu/bzip2@1.0.6-8ubuntu0.2+esm1?arch=source\u0026distro=esm-infra-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.6-8ubuntu0.2+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.6-8",
"1.0.6-8ubuntu0.1",
"1.0.6-8ubuntu0.2"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-42250",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "bzip2",
"binary_version": "1.0.6-8.1ubuntu0.2+esm1"
},
{
"binary_name": "libbz2-1.0",
"binary_version": "1.0.6-8.1ubuntu0.2+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "bzip2",
"purl": "pkg:deb/ubuntu/bzip2@1.0.6-8.1ubuntu0.2+esm1?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.6-8.1ubuntu0.2+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.6-8.1",
"1.0.6-8.1ubuntu0.1",
"1.0.6-8.1ubuntu0.2"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-42250",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "bzip2",
"binary_version": "1.0.8-2ubuntu0.1~esm1"
},
{
"binary_name": "libbz2-1.0",
"binary_version": "1.0.8-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "bzip2",
"purl": "pkg:deb/ubuntu/bzip2@1.0.8-2ubuntu0.1~esm1?arch=source\u0026distro=esm-infra/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.8-2ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.6-9.2",
"1.0.8-2"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-42250",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "bzip2",
"binary_version": "1.0.8-5ubuntu0.1"
},
{
"binary_name": "libbz2-1.0",
"binary_version": "1.0.8-5ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "bzip2",
"purl": "pkg:deb/ubuntu/bzip2@1.0.8-5ubuntu0.1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.8-5ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.8-4ubuntu3",
"1.0.8-4ubuntu4",
"1.0.8-5",
"1.0.8-5build1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-42250",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:24.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "bzip2",
"binary_version": "1.0.8-5.1ubuntu0.1"
},
{
"binary_name": "libbz2-1.0",
"binary_version": "1.0.8-5.1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "bzip2",
"purl": "pkg:deb/ubuntu/bzip2@1.0.8-5.1ubuntu0.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.8-5.1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.8-5build1",
"1.0.8-5ubuntu1",
"1.0.8-5.1",
"1.0.8-5.1build0.1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-42250",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:26.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "bzip2",
"binary_version": "1.0.8-6ubuntu0.1"
},
{
"binary_name": "libbz2-1.0",
"binary_version": "1.0.8-6ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "bzip2",
"purl": "pkg:deb/ubuntu/bzip2@1.0.8-6ubuntu0.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.8-6ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.8-6build1",
"1.0.8-6build2"
]
}
],
"aliases": [],
"details": "It was discovered that bzip2 did not properly manage memory under certain\ncircumstances. An attacker could possibly use this issue to cause a crash,\nresulting in a denial of service.",
"id": "USN-8685-1",
"modified": "2026-09-01T05:37:59Z",
"published": "2026-08-27T11:18:57Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8685-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-42250"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "bzip2 vulnerability",
"upstream": [
"UBUNTU-CVE-2026-42250"
]
}
Loading…
Loading…
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.
Loading…
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.
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.
Loading…
Loading…