UBUNTU-CVE-2026-124744

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Source
https://ubuntu.com/security/CVE-2026-124744
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-124744.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-124744
Upstream
  • CVE-2026-124744
Published
2026-11-12T00:00:00Z
Modified
2026-11-12T23:46:20Z
Severity
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in BusyBox. When extracting files using the cpio utility with path traversal protection enabled, hardlink target paths are not properly sanitized. By tricking a user or automated process into extracting a crafted archive, an attacker can create hardlinks that point to files outside the intended extraction directory. This issue may allow an attacker to modify or overwrite arbitrary files outside the target directory during subsequent extraction operations.

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
0 Unknown 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-2026-124744.json"
Ubuntu:22.04:LTS
busybox

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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-2026-124744.json"
Ubuntu:24.04:LTS
busybox

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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-2026-124744.json"
Ubuntu:26.04:LTS
busybox

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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-2026-124744.json"
Ubuntu:26.10
busybox

Package

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

Affected ranges

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

Affected versions

1:1.*
1:1.37.0-7ubuntu1
1:1.37.0-10.1ubuntu2
1:1.37.0-10.1ubuntu3
1:1.38.0-3ubuntu1
1:1.38.0-3ubuntu3
1:1.38.0-3ubuntu4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "busybox",
            "binary_version": "1:1.38.0-3ubuntu4"
        },
        {
            "binary_name": "busybox-static",
            "binary_version": "1:1.38.0-3ubuntu4"
        },
        {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.38.0-3ubuntu4"
        },
        {
            "binary_name": "udhcpc",
            "binary_version": "1:1.38.0-3ubuntu4"
        },
        {
            "binary_name": "udhcpd",
            "binary_version": "1:1.38.0-3ubuntu4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-124744.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
0 Unknown 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-2026-124744.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
0 Unknown 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-2026-124744.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
0 Unknown 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-2026-124744.json"