UBUNTU-CVE-2026-42250

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Source
https://ubuntu.com/security/CVE-2026-42250
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-42250
Upstream
  • CVE-2026-42250
Downstream
Related
Published
2026-05-28T14:16:00Z
Modified
2026-09-01T09:45:05Z
Severity
  • 4.8 (Medium) CVSS_V4 - 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 CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

bzip2 contains an off‑by‑one error in the bzip2recover utility. When processing a specially crafted file, the application performs an out‑of‑bounds write to a global buffer, resulting in memory corruption and a crash (denial of service). This issue was fixed in bzip2 patch 35d122a3df8b0cc4082a4d89fdc6ee99f375fe67

References

Affected packages

Ubuntu:22.04:LTS
bzip2

Package

Name
bzip2
Purl
pkg:deb/ubuntu/bzip2?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.8-5ubuntu0.1

Affected versions

1.*
1.0.8-4ubuntu3
1.0.8-4ubuntu4
1.0.8-5
1.0.8-5build1

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"
        }
    ],
    "priority_reason": "Only a denial of service in a command line utility"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"
Ubuntu:24.04:LTS
bzip2

Package

Name
bzip2
Purl
pkg:deb/ubuntu/bzip2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.8-5.1ubuntu0.1

Affected versions

1.*
1.0.8-5build1
1.0.8-5ubuntu1
1.0.8-5.1
1.0.8-5.1build0.1

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"
        }
    ],
    "priority_reason": "Only a denial of service in a command line utility"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"
Ubuntu:25.10
bzip2

Package

Name
bzip2
Purl
pkg:deb/ubuntu/bzip2?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.0.8-6
1.0.8-6build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "bzip2",
            "binary_version": "1.0.8-6build1"
        },
        {
            "binary_name": "libbz2-1.0",
            "binary_version": "1.0.8-6build1"
        }
    ],
    "priority_reason": "Only a denial of service in a command line utility"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"
Ubuntu:26.04:LTS
bzip2

Package

Name
bzip2
Purl
pkg:deb/ubuntu/bzip2?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.8-6ubuntu0.1

Affected versions

1.*
1.0.8-6build1
1.0.8-6build2

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"
        }
    ],
    "priority_reason": "Only a denial of service in a command line utility"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"
Ubuntu:Pro:14.04:LTS
bzip2

Package

Name
bzip2
Purl
pkg:deb/ubuntu/bzip2?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.6-5ubuntu0.1~esm3

Affected versions

1.*
1.0.6-4
1.0.6-5
1.0.6-5ubuntu0.1~esm1
1.0.6-5ubuntu0.1~esm2

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"
        }
    ],
    "priority_reason": "Only a denial of service in a command line utility"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"
Ubuntu:Pro:16.04:LTS
bzip2

Package

Name
bzip2
Purl
pkg:deb/ubuntu/bzip2?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.6-8ubuntu0.2+esm1

Affected versions

1.*
1.0.6-8
1.0.6-8ubuntu0.1
1.0.6-8ubuntu0.2

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"
        }
    ],
    "priority_reason": "Only a denial of service in a command line utility"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"
Ubuntu:Pro:18.04:LTS
bzip2

Package

Name
bzip2
Purl
pkg:deb/ubuntu/bzip2?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.6-8.1ubuntu0.2+esm1

Affected versions

1.*
1.0.6-8.1
1.0.6-8.1ubuntu0.1
1.0.6-8.1ubuntu0.2

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"
        }
    ],
    "priority_reason": "Only a denial of service in a command line utility"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"
Ubuntu:Pro:20.04:LTS
bzip2

Package

Name
bzip2
Purl
pkg:deb/ubuntu/bzip2?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.8-2ubuntu0.1~esm1

Affected versions

1.*
1.0.6-9.2
1.0.8-2

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"
        }
    ],
    "priority_reason": "Only a denial of service in a command line utility"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42250.json"