UBUNTU-CVE-2026-66484

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Source
https://ubuntu.com/security/CVE-2026-66484
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66484.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-66484
Upstream
  • CVE-2026-66484
Downstream
Related
Published
2026-08-10T11:17:00Z
Modified
2026-09-01T15:47:52Z
Severity
  • 4.6 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

GNU cpio contains a Path Traversal vulnerability in its tar archive extraction functionality. When extracting a tar archive in copy-in mode with the --no-absolute-filenames option, the extracted file name is normalized but the tar hard-link target is passed to the link_to_name function without equivalent sanitization before calling link function. A tar archive provided by an attacker, containing a hard-link entry whose linkname is set to an absolute path outside the extraction directory, can cause cpio to create a hard link to an existing file outside the intended extraction directory, breaking the expected guarantee of --no-absolute-filenames and allowing archive-controlled linkage to external files. This issue has been fixed in commit e2b9cbdd3354d2b1569b7390d1bc15c1930559ad

References

Affected packages

Ubuntu:22.04:LTS
cpio

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.13+dfsg-7ubuntu0.2

Affected versions

2.*
2.13+dfsg-4ubuntu4
2.13+dfsg-7
2.13+dfsg-7ubuntu0.1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "cpio",
            "binary_version":  "2.13+dfsg-7ubuntu0.2"
        },
        {
            "binary_name":  "cpio-win32",
            "binary_version":  "2.13+dfsg-7ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66484.json"
Ubuntu:24.04:LTS
cpio

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.15+dfsg-1ubuntu2.1

Affected versions

2.*
2.13+dfsg-7.1
2.14+dfsg-1
2.15+dfsg-1
2.15+dfsg-1ubuntu1
2.15+dfsg-1ubuntu2

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "cpio",
            "binary_version":  "2.15+dfsg-1ubuntu2.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66484.json"
Ubuntu:26.04:LTS
cpio

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.15+dfsg-2.1ubuntu0.1

Affected versions

2.*
2.15+dfsg-2ubuntu1
2.15+dfsg-2.1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "cpio",
            "binary_version":  "2.15+dfsg-2.1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66484.json"
Ubuntu:Pro:14.04:LTS
cpio

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.11+dfsg-1ubuntu1.2+esm3

Affected versions

2.*
2.11+dfsg-1ubuntu1
2.11+dfsg-1ubuntu1.1
2.11+dfsg-1ubuntu1.2
2.11+dfsg-1ubuntu1.2+esm1
2.11+dfsg-1ubuntu1.2+esm2

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "cpio",
            "binary_version":  "2.11+dfsg-1ubuntu1.2+esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66484.json"
Ubuntu:Pro:16.04:LTS
cpio

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.11+dfsg-5ubuntu1.1+esm2

Affected versions

2.*
2.11+dfsg-4.1ubuntu1
2.11+dfsg-5ubuntu1
2.11+dfsg-5ubuntu1.1
2.11+dfsg-5ubuntu1.1+esm1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "cpio",
            "binary_version":  "2.11+dfsg-5ubuntu1.1+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66484.json"
Ubuntu:Pro:18.04:LTS
cpio

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.12+dfsg-6ubuntu0.18.04.4+esm1

Affected versions

2.*
2.11+dfsg-6
2.12+dfsg-6
2.12+dfsg-6ubuntu0.18.04.1
2.12+dfsg-6ubuntu0.18.04.4

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "cpio",
            "binary_version":  "2.12+dfsg-6ubuntu0.18.04.4+esm1"
        },
        {
            "binary_name":  "cpio-win32",
            "binary_version":  "2.12+dfsg-6ubuntu0.18.04.4+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66484.json"
Ubuntu:Pro:20.04:LTS
cpio

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.13+dfsg-2ubuntu0.4+esm1

Affected versions

2.*
2.12+dfsg-9
2.12+dfsg-9ubuntu1
2.13+dfsg-1
2.13+dfsg-2
2.13+dfsg-2ubuntu0.3
2.13+dfsg-2ubuntu0.4

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "cpio",
            "binary_version":  "2.13+dfsg-2ubuntu0.4+esm1"
        },
        {
            "binary_name":  "cpio-win32",
            "binary_version":  "2.13+dfsg-2ubuntu0.4+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66484.json"