UBUNTU-CVE-2026-19079

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Source
https://ubuntu.com/security/CVE-2026-19079
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19079.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-19079
Upstream
  • CVE-2026-19079
Published
2026-08-07T00:00:00Z
Modified
2026-08-07T17:45:11.326164462Z
Severity
  • 4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A TOCTOU (Time-of-Check-Time-of-Use) race condition vulnerability was found in the fixfiles script in policycoreutils. When running fixfiles relabel or fixfiles restore, the script used find and chcon commands to locate and relabel unlabeled files under /tmp and other directories. A local attacker could exploit a race window between the file discovery and the label change operation by swapping directory components with symlinks, causing chcon to follow the symlink and modify SELinux labels on arbitrary system files. This could undermine SELinux mandatory access control protections on critical files such as /etc/shadow.

References

Affected packages

Ubuntu:14.04:LTS
policycoreutils

Package

Name
policycoreutils
Purl
pkg:deb/ubuntu/policycoreutils?arch=source&distro=trusty

Affected ranges

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

Affected versions

2.*
2.1.13-2
2.2.1-1
2.2.4-1
2.2.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.2.5-1",
            "binary_name": "policycoreutils"
        },
        {
            "binary_version": "2.2.5-1",
            "binary_name": "python-sepolicy"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19079.json"
Ubuntu:16.04:LTS
policycoreutils

Package

Name
policycoreutils
Purl
pkg:deb/ubuntu/policycoreutils?arch=source&distro=xenial

Affected ranges

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

Affected versions

2.*
2.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.3-1",
            "binary_name": "policycoreutils"
        },
        {
            "binary_version": "2.3-1",
            "binary_name": "python-sepolicy"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19079.json"
Ubuntu:18.04:LTS
policycoreutils

Package

Name
policycoreutils
Purl
pkg:deb/ubuntu/policycoreutils?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*
2.7-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.7-1",
            "binary_name": "newrole"
        },
        {
            "binary_version": "2.7-1",
            "binary_name": "policycoreutils"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19079.json"
Ubuntu:20.04:LTS
policycoreutils

Package

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

Affected ranges

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

Affected versions

2.*
2.9-2
3.*
3.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.0-1",
            "binary_name": "newrole"
        },
        {
            "binary_version": "3.0-1",
            "binary_name": "policycoreutils"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19079.json"
Ubuntu:22.04:LTS
policycoreutils

Package

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

Affected ranges

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

Affected versions

3.*
3.1-3
3.3-1
3.3-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.3-1build1",
            "binary_name": "newrole"
        },
        {
            "binary_version": "3.3-1build1",
            "binary_name": "policycoreutils"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19079.json"
Ubuntu:24.04:LTS
policycoreutils

Package

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

Affected ranges

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

Affected versions

3.*
3.5-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.5-2",
            "binary_name": "newrole"
        },
        {
            "binary_version": "3.5-2",
            "binary_name": "policycoreutils"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19079.json"
Ubuntu:26.04:LTS
policycoreutils

Package

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

Affected ranges

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

Affected versions

3.*
3.8.1-1
3.9-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.9-2",
            "binary_name": "newrole"
        },
        {
            "binary_version": "3.9-2",
            "binary_name": "policycoreutils"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19079.json"