USN-8685-1

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-8685-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8685-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8685-1
Upstream
Related
Published
2026-08-27T11:18:57Z
Modified
2026-09-01T09:55:50.415111477Z
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

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
0Unknown 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_version": "1.0.8-5ubuntu0.1",
            "binary_name": "bzip2"
        },
        {
            "binary_version": "1.0.8-5ubuntu0.1",
            "binary_name": "libbz2-1.0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8685-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-42250",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "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": "Ubuntu",
                    "score": "low"
                }
            ]
        }
    ]
}
Ubuntu:24.04:LTS
bzip2

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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_version": "1.0.8-5.1ubuntu0.1",
            "binary_name": "bzip2"
        },
        {
            "binary_version": "1.0.8-5.1ubuntu0.1",
            "binary_name": "libbz2-1.0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8685-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-42250",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "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": "Ubuntu",
                    "score": "low"
                }
            ]
        }
    ]
}
Ubuntu:26.04:LTS
bzip2

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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_version": "1.0.8-6ubuntu0.1",
            "binary_name": "bzip2"
        },
        {
            "binary_version": "1.0.8-6ubuntu0.1",
            "binary_name": "libbz2-1.0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8685-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:26.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-42250",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "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": "Ubuntu",
                    "score": "low"
                }
            ]
        }
    ]
}
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
0Unknown 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_version": "1.0.6-5ubuntu0.1~esm3",
            "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"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8685-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:14.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-42250",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "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": "Ubuntu",
                    "score": "low"
                }
            ]
        }
    ]
}
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
0Unknown 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_version": "1.0.6-8ubuntu0.2+esm1",
            "binary_name": "bzip2"
        },
        {
            "binary_version": "1.0.6-8ubuntu0.2+esm1",
            "binary_name": "libbz2-1.0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8685-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-42250",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "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": "Ubuntu",
                    "score": "low"
                }
            ]
        }
    ]
}
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
0Unknown 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_version": "1.0.6-8.1ubuntu0.2+esm1",
            "binary_name": "bzip2"
        },
        {
            "binary_version": "1.0.6-8.1ubuntu0.2+esm1",
            "binary_name": "libbz2-1.0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8685-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:18.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-42250",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "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": "Ubuntu",
                    "score": "low"
                }
            ]
        }
    ]
}
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
0Unknown 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_version": "1.0.8-2ubuntu0.1~esm1",
            "binary_name": "bzip2"
        },
        {
            "binary_version": "1.0.8-2ubuntu0.1~esm1",
            "binary_name": "libbz2-1.0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8685-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-42250",
            "severity": [
                {
                    "type": "CVSS_V4",
                    "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": "Ubuntu",
                    "score": "low"
                }
            ]
        }
    ]
}