UBUNTU-CVE-2026-26157

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Source
https://ubuntu.com/security/CVE-2026-26157
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26157.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-26157
Upstream
  • CVE-2026-26157
Published
2026-02-11T21:16:00Z
Modified
2026-05-20T16:24:50.166506811Z
Severity
  • 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in BusyBox. Incomplete path sanitization in its archive extraction utilities allows an attacker to craft malicious archives that when extracted, and under specific conditions, may write to files outside the intended directory. This can lead to arbitrary file overwrite, potentially enabling code execution through the modification of sensitive system files.

References

Affected packages

Ubuntu:20.04:LTS
busybox

Package

Name
busybox
Purl
pkg:deb/ubuntu/busybox?arch=source&distro=focal

Affected ranges

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

Affected versions

1:1.*
1:1.30.1-4ubuntu4
1:1.30.1-4ubuntu5
1:1.30.1-4ubuntu6
1:1.30.1-4ubuntu6.1
1:1.30.1-4ubuntu6.2
1:1.30.1-4ubuntu6.3
1:1.30.1-4ubuntu6.4
1:1.30.1-4ubuntu6.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.30.1-4ubuntu6.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26157.json"
Ubuntu:22.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.30.1-6ubuntu3
1:1.30.1-7ubuntu1
1:1.30.1-7ubuntu2
1:1.30.1-7ubuntu3
1:1.30.1-7ubuntu3.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.30.1-7ubuntu3.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26157.json"
Ubuntu:24.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.36.1-3ubuntu1
1:1.36.1-6ubuntu1
1:1.36.1-6ubuntu3
1:1.36.1-6ubuntu3.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.36.1-6ubuntu3.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26157.json"
Ubuntu:25.10
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.37.0-4ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.37.0-4ubuntu1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.37.0-4ubuntu1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.37.0-4ubuntu1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.37.0-4ubuntu1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.37.0-4ubuntu1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.37.0-4ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26157.json"
Ubuntu:26.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.37.0-4ubuntu1
1:1.37.0-7ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.37.0-7ubuntu1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.37.0-7ubuntu1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.37.0-7ubuntu1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.37.0-7ubuntu1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.37.0-7ubuntu1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.37.0-7ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26157.json"
Ubuntu:Pro:14.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.20.0-8.1ubuntu1
1:1.20.0-9ubuntu1
1:1.20.0-9ubuntu2
1:1.21.0-1ubuntu1
1:1.21.0-1ubuntu1.4
1:1.21.0-1ubuntu1.4+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26157.json"
Ubuntu:Pro:16.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.22.0-15ubuntu1
1:1.22.0-15ubuntu1.4
1:1.22.0-15ubuntu1.4+esm1
1:1.22.0-15ubuntu1.4+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26157.json"
Ubuntu:Pro:18.04:LTS
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.22.0-19ubuntu2
1:1.27.2-1ubuntu3
1:1.27.2-1ubuntu4
1:1.27.2-2ubuntu2
1:1.27.2-2ubuntu3
1:1.27.2-2ubuntu3.1
1:1.27.2-2ubuntu3.2
1:1.27.2-2ubuntu3.3
1:1.27.2-2ubuntu3.4
1:1.27.2-2ubuntu3.4+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        },
        {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.27.2-2ubuntu3.4+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26157.json"