UBUNTU-CVE-2026-66485

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Source
https://ubuntu.com/security/CVE-2026-66485
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66485.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-66485
Upstream
  • CVE-2026-66485
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:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

GNU cpio is vulnerable to an uncontrolled memory allocation in the make_path function at src/makepath.c. The function uses alloca to allocate stack memory based on the length of argpath, which is derived from an archive-controlled pathname during extraction. A malicious cpio archive containing a sufficiently long nested pathname causes an unbounded stack allocation, resulting in a stack overflow and crash of the cpio process. An attacker who can supply a crafted cpio archive to a victim who extracts it can cause a denial of service. This issue has been fixed in commit 3cd514031371d8aeeaf2048aa10103e02831aaa9

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-2026-66485.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-2026-66485.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-2026-66485.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-2026-66485.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-2026-66485.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-2026-66485.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-2026-66485.json"