UBUNTU-CVE-2026-4111

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Source
https://ubuntu.com/security/CVE-2026-4111
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4111.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-4111
Upstream
Published
2026-03-13T19:55:00Z
Modified
2026-03-19T05:25:34Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was identified in the RAR5 archive decompression logic of the libarchive library, specifically within the archivereaddata() processing path. When a specially crafted RAR5 archive is processed, the decompression routine may enter a state where internal logic prevents forward progress. This condition results in an infinite loop that continuously consumes CPU resources. Because the archive passes checksum validation and appears structurally valid, affected applications cannot detect the issue before processing. This can allow attackers to cause persistent denial-of-service conditions in services that automatically process archives.

References

Affected packages

Ubuntu:20.04:LTS
libarchive

Package

Name
libarchive
Purl
pkg:deb/ubuntu/libarchive@3.4.0-2ubuntu1.5?arch=source&distro=focal

Affected ranges

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

Affected versions

3.*
3.4.0-1
3.4.0-1build1
3.4.0-1ubuntu2
3.4.0-2ubuntu1
3.4.0-2ubuntu1.1
3.4.0-2ubuntu1.2
3.4.0-2ubuntu1.3
3.4.0-2ubuntu1.4
3.4.0-2ubuntu1.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.4.0-2ubuntu1.5",
            "binary_name": "libarchive-dev"
        },
        {
            "binary_version": "3.4.0-2ubuntu1.5",
            "binary_name": "libarchive-tools"
        },
        {
            "binary_version": "3.4.0-2ubuntu1.5",
            "binary_name": "libarchive13"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4111.json"
Ubuntu:22.04:LTS
libarchive

Package

Name
libarchive
Purl
pkg:deb/ubuntu/libarchive@3.6.0-1ubuntu1.5?arch=source&distro=jammy

Affected ranges

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

Affected versions

3.*
3.4.3-2
3.4.3-2build1
3.5.2-1
3.5.2-1ubuntu1
3.6.0-1ubuntu1
3.6.0-1ubuntu1.1
3.6.0-1ubuntu1.2
3.6.0-1ubuntu1.3
3.6.0-1ubuntu1.4
3.6.0-1ubuntu1.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.6.0-1ubuntu1.5",
            "binary_name": "libarchive-dev"
        },
        {
            "binary_version": "3.6.0-1ubuntu1.5",
            "binary_name": "libarchive-tools"
        },
        {
            "binary_version": "3.6.0-1ubuntu1.5",
            "binary_name": "libarchive13"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4111.json"
Ubuntu:24.04:LTS
libarchive

Package

Name
libarchive
Purl
pkg:deb/ubuntu/libarchive@3.7.2-2ubuntu0.5?arch=source&distro=noble

Affected ranges

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

Affected versions

3.*
3.6.2-1ubuntu1
3.7.2-1ubuntu1
3.7.2-1ubuntu2
3.7.2-1.1ubuntu2
3.7.2-2
3.7.2-2ubuntu0.1
3.7.2-2ubuntu0.2
3.7.2-2ubuntu0.3
3.7.2-2ubuntu0.4
3.7.2-2ubuntu0.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.7.2-2ubuntu0.5",
            "binary_name": "libarchive-dev"
        },
        {
            "binary_version": "3.7.2-2ubuntu0.5",
            "binary_name": "libarchive-tools"
        },
        {
            "binary_version": "3.7.2-2ubuntu0.5",
            "binary_name": "libarchive13t64"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4111.json"
Ubuntu:25.10
libarchive

Package

Name
libarchive
Purl
pkg:deb/ubuntu/libarchive@3.7.7-0ubuntu3?arch=source&distro=questing

Affected ranges

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

Affected versions

3.*
3.7.7-0ubuntu2
3.7.7-0ubuntu2.1
3.7.7-0ubuntu2.2
3.7.7-0ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.7.7-0ubuntu3",
            "binary_name": "libarchive-dev"
        },
        {
            "binary_version": "3.7.7-0ubuntu3",
            "binary_name": "libarchive-tools"
        },
        {
            "binary_version": "3.7.7-0ubuntu3",
            "binary_name": "libarchive13t64"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4111.json"
Ubuntu:Pro:14.04:LTS
libarchive

Package

Name
libarchive
Purl
pkg:deb/ubuntu/libarchive@3.1.2-7ubuntu2.8+esm3?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

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

Affected versions

3.*
3.1.2-5ubuntu1
3.1.2-7ubuntu1
3.1.2-7ubuntu2
3.1.2-7ubuntu2.1
3.1.2-7ubuntu2.2
3.1.2-7ubuntu2.3
3.1.2-7ubuntu2.4
3.1.2-7ubuntu2.6
3.1.2-7ubuntu2.7
3.1.2-7ubuntu2.8
3.1.2-7ubuntu2.8+esm1
3.1.2-7ubuntu2.8+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.1.2-7ubuntu2.8+esm3",
            "binary_name": "bsdcpio"
        },
        {
            "binary_version": "3.1.2-7ubuntu2.8+esm3",
            "binary_name": "bsdtar"
        },
        {
            "binary_version": "3.1.2-7ubuntu2.8+esm3",
            "binary_name": "libarchive-dev"
        },
        {
            "binary_version": "3.1.2-7ubuntu2.8+esm3",
            "binary_name": "libarchive13"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4111.json"
Ubuntu:Pro:16.04:LTS
libarchive

Package

Name
libarchive
Purl
pkg:deb/ubuntu/libarchive@3.1.2-11ubuntu0.16.04.8+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

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

Affected versions

3.*
3.1.2-11build1
3.1.2-11ubuntu0.16.04.1
3.1.2-11ubuntu0.16.04.2
3.1.2-11ubuntu0.16.04.3
3.1.2-11ubuntu0.16.04.4
3.1.2-11ubuntu0.16.04.5
3.1.2-11ubuntu0.16.04.6
3.1.2-11ubuntu0.16.04.7
3.1.2-11ubuntu0.16.04.8
3.1.2-11ubuntu0.16.04.8+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm1",
            "binary_name": "bsdcpio"
        },
        {
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm1",
            "binary_name": "bsdtar"
        },
        {
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm1",
            "binary_name": "libarchive-dev"
        },
        {
            "binary_version": "3.1.2-11ubuntu0.16.04.8+esm1",
            "binary_name": "libarchive13"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4111.json"
Ubuntu:Pro:18.04:LTS
libarchive

Package

Name
libarchive
Purl
pkg:deb/ubuntu/libarchive@3.2.2-3.1ubuntu0.7+esm1?arch=source&distro=esm-infra/bionic

Affected ranges

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

Affected versions

3.*
3.2.2-3.1
3.2.2-3.1ubuntu0.1
3.2.2-3.1ubuntu0.2
3.2.2-3.1ubuntu0.3
3.2.2-3.1ubuntu0.4
3.2.2-3.1ubuntu0.5
3.2.2-3.1ubuntu0.6
3.2.2-3.1ubuntu0.7
3.2.2-3.1ubuntu0.7+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.2.2-3.1ubuntu0.7+esm1",
            "binary_name": "bsdcpio"
        },
        {
            "binary_version": "3.2.2-3.1ubuntu0.7+esm1",
            "binary_name": "bsdtar"
        },
        {
            "binary_version": "3.2.2-3.1ubuntu0.7+esm1",
            "binary_name": "libarchive-dev"
        },
        {
            "binary_version": "3.2.2-3.1ubuntu0.7+esm1",
            "binary_name": "libarchive-tools"
        },
        {
            "binary_version": "3.2.2-3.1ubuntu0.7+esm1",
            "binary_name": "libarchive13"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4111.json"