UBUNTU-CVE-2026-55480

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Source
https://ubuntu.com/security/CVE-2026-55480
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55480.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-55480
Upstream
Published
2026-10-15T18:17:00Z
Modified
2026-10-28T20:17:23Z
Severity
  • 5.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/.ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a symlink before the root open, while a privileged add-printer or modify-printer operation using a model PPD triggers copy_model(). The reporter treats an existing lp foothold and the privileged operation as distinct prerequisites, while the maintainer assesses high privileges because installing the relevant filter or administering the printer requires root or print-administrator access. If the race succeeds, the root scheduler follows the symlink and truncates or overwrites a root-writable target with generated PPD data, compromising file integrity or availability. This issue is fixed in version 2.4.20.

References

Affected packages

Ubuntu:22.04:LTS
cups

Package

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

Affected ranges

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

Affected versions

2.*
2.3.3op2-7ubuntu2
2.4.1op1-1ubuntu1
2.4.1op1-1ubuntu2
2.4.1op1-1ubuntu3
2.4.1op1-1ubuntu4
2.4.1op1-1ubuntu4.1
2.4.1op1-1ubuntu4.2
2.4.1op1-1ubuntu4.4
2.4.1op1-1ubuntu4.6
2.4.1op1-1ubuntu4.7
2.4.1op1-1ubuntu4.8
2.4.1op1-1ubuntu4.9
2.4.1op1-1ubuntu4.10
2.4.1op1-1ubuntu4.11
2.4.1op1-1ubuntu4.12
2.4.1op1-1ubuntu4.15
2.4.1op1-1ubuntu4.16
2.4.1op1-1ubuntu4.20
2.4.1op1-1ubuntu4.21

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.4.1op1-1ubuntu4.21"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.4.1op1-1ubuntu4.21"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.4.1op1-1ubuntu4.21"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.4.1op1-1ubuntu4.21"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.4.1op1-1ubuntu4.21"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.4.1op1-1ubuntu4.21"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.4.1op1-1ubuntu4.21"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.4.1op1-1ubuntu4.21"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.4.1op1-1ubuntu4.21"
        },
        {
            "binary_name": "libcups2",
            "binary_version": "2.4.1op1-1ubuntu4.21"
        },
        {
            "binary_name": "libcupsimage2",
            "binary_version": "2.4.1op1-1ubuntu4.21"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55480.json"
Ubuntu:24.04:LTS
cups

Package

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

Affected ranges

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

Affected versions

2.*
2.4.6-0ubuntu3
2.4.7-1.2ubuntu2
2.4.7-1.2ubuntu3
2.4.7-1.2ubuntu7
2.4.7-1.2ubuntu7.1
2.4.7-1.2ubuntu7.2
2.4.7-1.2ubuntu7.3
2.4.7-1.2ubuntu7.4
2.4.7-1.2ubuntu7.7
2.4.7-1.2ubuntu7.9
2.4.7-1.2ubuntu7.13
2.4.7-1.2ubuntu7.14

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.4.7-1.2ubuntu7.14"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.4.7-1.2ubuntu7.14"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.4.7-1.2ubuntu7.14"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.4.7-1.2ubuntu7.14"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.4.7-1.2ubuntu7.14"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.4.7-1.2ubuntu7.14"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.4.7-1.2ubuntu7.14"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.4.7-1.2ubuntu7.14"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.4.7-1.2ubuntu7.14"
        },
        {
            "binary_name": "libcups2t64",
            "binary_version": "2.4.7-1.2ubuntu7.14"
        },
        {
            "binary_name": "libcupsimage2t64",
            "binary_version": "2.4.7-1.2ubuntu7.14"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55480.json"
Ubuntu:26.04:LTS
cups

Package

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

Affected ranges

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

Affected versions

2.*
2.4.12-0ubuntu3
2.4.12-0ubuntu5
2.4.16-1ubuntu1
2.4.16-1ubuntu1.2
2.4.16-1ubuntu1.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.4.16-1ubuntu1.3"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.4.16-1ubuntu1.3"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.4.16-1ubuntu1.3"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.4.16-1ubuntu1.3"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.4.16-1ubuntu1.3"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.4.16-1ubuntu1.3"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.4.16-1ubuntu1.3"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.4.16-1ubuntu1.3"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.4.16-1ubuntu1.3"
        },
        {
            "binary_name": "libcups2t64",
            "binary_version": "2.4.16-1ubuntu1.3"
        },
        {
            "binary_name": "libcupsimage2t64",
            "binary_version": "2.4.16-1ubuntu1.3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55480.json"
Ubuntu:26.10
cups

Package

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

Affected ranges

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

Affected versions

2.*
2.4.16-1ubuntu1
2.4.16-1ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.4.16-1ubuntu3"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.4.16-1ubuntu3"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.4.16-1ubuntu3"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.4.16-1ubuntu3"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.4.16-1ubuntu3"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.4.16-1ubuntu3"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.4.16-1ubuntu3"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.4.16-1ubuntu3"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.4.16-1ubuntu3"
        },
        {
            "binary_name": "libcups2t64",
            "binary_version": "2.4.16-1ubuntu3"
        },
        {
            "binary_name": "libcupsimage2t64",
            "binary_version": "2.4.16-1ubuntu3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55480.json"
Ubuntu:Pro:16.04:LTS
cups

Package

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

Affected ranges

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

Affected versions

2.*
2.1.0-4ubuntu3
2.1.0-5
2.1.0-6
2.1.0-6ubuntu1
2.1.0-7
2.1.2-1
2.1.2-2
2.1.3-1
2.1.3-1build1
2.1.3-3
2.1.3-4
2.1.3-4ubuntu0.2
2.1.3-4ubuntu0.3
2.1.3-4ubuntu0.4
2.1.3-4ubuntu0.5
2.1.3-4ubuntu0.6
2.1.3-4ubuntu0.7
2.1.3-4ubuntu0.8
2.1.3-4ubuntu0.9
2.1.3-4ubuntu0.10
2.1.3-4ubuntu0.11
2.1.3-4ubuntu0.11+esm1
2.1.3-4ubuntu0.11+esm2
2.1.3-4ubuntu0.11+esm3
2.1.3-4ubuntu0.11+esm4
2.1.3-4ubuntu0.11+esm5
2.1.3-4ubuntu0.11+esm6
2.1.3-4ubuntu0.11+esm7
2.1.3-4ubuntu0.11+esm8
2.1.3-4ubuntu0.11+esm9
2.1.3-4ubuntu0.11+esm11
2.1.3-4ubuntu0.11+esm12
2.1.3-4ubuntu0.11+esm13

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "libcups2",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "libcupscgi1",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "libcupsimage2",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "libcupsmime1",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        },
        {
            "binary_name": "libcupsppdc1",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55480.json"
Ubuntu:Pro:18.04:LTS
cups

Package

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

Affected ranges

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

Affected versions

2.*
2.2.4-7ubuntu2
2.2.5-2
2.2.6-2
2.2.6-3
2.2.6-4
2.2.6-5
2.2.7-1ubuntu1
2.2.7-1ubuntu2
2.2.7-1ubuntu2.1
2.2.7-1ubuntu2.2
2.2.7-1ubuntu2.3
2.2.7-1ubuntu2.4
2.2.7-1ubuntu2.5
2.2.7-1ubuntu2.6
2.2.7-1ubuntu2.7
2.2.7-1ubuntu2.8
2.2.7-1ubuntu2.9
2.2.7-1ubuntu2.10
2.2.7-1ubuntu2.10+esm1
2.2.7-1ubuntu2.10+esm2
2.2.7-1ubuntu2.10+esm3
2.2.7-1ubuntu2.10+esm4
2.2.7-1ubuntu2.10+esm5
2.2.7-1ubuntu2.10+esm6
2.2.7-1ubuntu2.10+esm7
2.2.7-1ubuntu2.10+esm9
2.2.7-1ubuntu2.10+esm10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcups2",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcupscgi1",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcupsimage2",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcupsmime1",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcupsppdc1",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55480.json"
Ubuntu:Pro:20.04:LTS
cups

Package

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

Affected ranges

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

Affected versions

2.*
2.2.12-2ubuntu1
2.3.0-6
2.3.0-7
2.3.0-7ubuntu1
2.3.1-1ubuntu1
2.3.1-2
2.3.1-4
2.3.1-7
2.3.1-9ubuntu1
2.3.1-9ubuntu1.1
2.3.1-9ubuntu1.2
2.3.1-9ubuntu1.3
2.3.1-9ubuntu1.4
2.3.1-9ubuntu1.5
2.3.1-9ubuntu1.6
2.3.1-9ubuntu1.7
2.3.1-9ubuntu1.8
2.3.1-9ubuntu1.9
2.3.1-9ubuntu1.9+esm1
2.3.1-9ubuntu1.9+esm3
2.3.1-9ubuntu1.9+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "libcups2",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "libcupsimage2",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55480.json"