UBUNTU-CVE-2026-79655

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Source
https://ubuntu.com/security/CVE-2026-79655
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-79655
Upstream
  • CVE-2026-79655
Published
2026-08-25T14:16:00Z
Modified
2026-09-02T19:36:49.905187043Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in sos clean, a utility within the sos package. This vulnerability allows a local attacker to perform arbitrary file creation or overwrite. By crafting a malicious tar archive, an attacker can exploit a path traversal issue during tar extraction, where symlink and hardlink targets are not properly validated. This enables the attacker to write files to arbitrary locations on the system with the privileges of the sos clean process, which often runs as root.

References

Affected packages

Ubuntu:20.04:LTS
sosreport

Package

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

Affected ranges

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

Affected versions

3.*
3.6-1ubuntu3
3.8-1ubuntu1
3.8-1ubuntu2
3.8-1ubuntu3
3.9-1ubuntu1
3.9-1ubuntu2
3.9-1ubuntu2.1
3.9.1-1ubuntu0.20.04.1
3.9.1-1ubuntu0.20.04.2
4.*
4.0-1~ubuntu0.20.04.1
4.0-1~ubuntu0.20.04.2
4.0-1~ubuntu0.20.04.3
4.1-1ubuntu0.20.04.1
4.1-1ubuntu0.20.04.2
4.1-1ubuntu0.20.04.3
4.2-1ubuntu0.20.04.1
4.3-1ubuntu0.20.04.1
4.3-1ubuntu0.20.04.2
4.4-1ubuntu0.20.04.1
4.5.6-0ubuntu1~20.04.1
4.5.6-0ubuntu1~20.04.2
4.7.2-0ubuntu1~20.04.1
4.7.2-0ubuntu1~20.04.2
4.8.2-0ubuntu0~20.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.8.2-0ubuntu0~20.04.1",
            "binary_name": "sosreport"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"
Ubuntu:22.04:LTS
sosreport

Package

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

Affected ranges

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

Affected versions

4.*
4.1-1ubuntu2
4.1-1ubuntu3
4.2-1ubuntu2
4.3-1ubuntu1
4.3-1ubuntu2
4.3-1ubuntu2.1
4.4-1ubuntu1.22.04.1
4.5.6-0ubuntu1~22.04.1
4.5.6-0ubuntu1~22.04.2
4.7.2-0ubuntu1~22.04.1
4.7.2-0ubuntu1~22.04.2
4.8.2-0ubuntu0~22.04.1
4.8.2-0ubuntu0~22.04.2
4.9.2-0ubuntu0~22.04.1
4.10.2-0ubuntu0~22.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.10.2-0ubuntu0~22.04.1",
            "binary_name": "sosreport"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"
Ubuntu:24.04:LTS
sosreport

Package

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

Affected ranges

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

Affected versions

4.*
4.5.6-0ubuntu2
4.5.6-0ubuntu4
4.7.2-0ubuntu1~24.04.1
4.7.2-0ubuntu1~24.04.2
4.8.2-0ubuntu0~24.04.1
4.8.2-0ubuntu0~24.04.2
4.9.2-0ubuntu0~24.04.1
4.10.2-0ubuntu0~24.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.10.2-0ubuntu0~24.04.1",
            "binary_name": "sosreport"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"
Ubuntu:26.04:LTS
sos

Package

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

Affected ranges

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

Affected versions

4.*
4.10.0-1
4.10.1-1
4.10.2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.10.2-1",
            "binary_name": "sos"
        },
        {
            "binary_version": "4.10.2-1",
            "binary_name": "sosreport"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"
Ubuntu:Pro:14.04:LTS
sosreport

Package

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

Affected ranges

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

Affected versions

3.*
3.0-1
3.1-1
3.1-1ubuntu1
3.1-1ubuntu2
3.1-1ubuntu2.1
3.1-1ubuntu2.2
3.4-1~ubuntu14.04.1
3.5-1~ubuntu14.04.2
3.5-1~ubuntu14.04.3
3.5-1~ubuntu14.04.3+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.5-1~ubuntu14.04.3+esm1",
            "binary_name": "sosreport"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"
Ubuntu:Pro:16.04:LTS
sosreport

Package

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

Affected ranges

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

Affected versions

3.*
3.2-2ubuntu1
3.2+git276-g7da50d6-1
3.2+git276-g7da50d6-2
3.2+git276-g7da50d6-3
3.2+git276-g7da50d6-3build1
3.2+git276-g7da50d6-3ubuntu1
3.4-1~ubuntu16.04.1
3.5-1~ubuntu16.04.2
3.5-1~ubuntu16.04.3
3.6-1ubuntu0.16.04.2
3.6-1ubuntu0.16.04.3
3.6-1ubuntu0.16.04.4
3.9-1ubuntu0.16.04.1
3.9-1ubuntu0.16.04.2
3.9.1-1ubuntu0.16.04.1
3.9.1-1ubuntu0.16.04.2
3.9.1-1ubuntu0.16.04.2+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.9.1-1ubuntu0.16.04.2+esm1",
            "binary_name": "sosreport"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"
Ubuntu:Pro:18.04:LTS
sosreport

Package

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

Affected ranges

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

Affected versions

3.*
3.4-1
3.5-1
3.5-1ubuntu1
3.5-1ubuntu2
3.5-1ubuntu3
3.5-1ubuntu3.18.04.1
3.6-1ubuntu0.18.04.2
3.6-1ubuntu0.18.04.3
3.6-1ubuntu0.18.04.4
3.9-1ubuntu0.18.04.1
3.9-1ubuntu0.18.04.2
3.9-1ubuntu0.18.04.3
3.9.1-1ubuntu0.18.04.1
3.9.1-1ubuntu0.18.04.2
3.9.1-1ubuntu0.18.04.3
4.*
4.1-1ubuntu0.18.04.1
4.1-1ubuntu0.18.04.2
4.1-1ubuntu0.18.04.3
4.3-1ubuntu0.18.04.1
4.3-1ubuntu0.18.04.2
4.4-1ubuntu0.18.04.1
4.4-1ubuntu0.18.04.3
4.8.2-0ubuntu0~18.04.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.8.2-0ubuntu0~18.04.1~esm1",
            "binary_name": "sosreport"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-79655.json"