UBUNTU-CVE-2026-15812

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Source
https://ubuntu.com/security/CVE-2026-15812
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15812.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-15812
Upstream
  • CVE-2026-15812
Published
2026-07-21T06:16:00Z
Modified
2026-07-29T10:15:51Z
Severity
  • 4.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A vulnerability was found in the internal Access Control List (ACL) subsystem of kronosnet (Version affected: <= 1.34). When the framework is explicitly configured to manage dynamic links (accepting network traffic from any IP address) without network payload encryption, the validation architecture implicitly trusts the link ID provided within incoming data packets. A remote, unauthenticated attacker can exploit this lack of validation by spoofing a legitimate link ID inside crafted network frames. This allows the attacker to fully bypass the ACL framework and inject arbitrary data packets into the application layer, potentially leading to data corruption or service instabilities.

References

Affected packages

Ubuntu:18.04:LTS / kronosnet

Package

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

Affected ranges

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

Affected versions

1.*
1.0-1
1.0-1build1
1.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libknet1",
            "binary_version": "1.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15812.json"

Ubuntu:20.04:LTS / kronosnet

Package

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

Affected ranges

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

Affected versions

1.*
1.8-2
1.13-1
1.14-1ubuntu2
1.15-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libknet1",
            "binary_version": "1.15-1ubuntu1"
        },
        {
            "binary_name": "libnozzle1",
            "binary_version": "1.15-1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15812.json"

Ubuntu:22.04:LTS / kronosnet

Package

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

Affected ranges

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

Affected versions

1.*
1.20-4build1
1.22-1
1.23-2
1.23-2build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libknet1",
            "binary_version": "1.23-2build1"
        },
        {
            "binary_name": "libnozzle1",
            "binary_version": "1.23-2build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15812.json"

Ubuntu:24.04:LTS / kronosnet

Package

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

Affected ranges

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

Affected versions

1.*
1.26-1
1.28-1
1.28-2ubuntu1
1.28-2ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libknet1t64",
            "binary_version": "1.28-2ubuntu2"
        },
        {
            "binary_name": "libnozzle1t64",
            "binary_version": "1.28-2ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15812.json"

Ubuntu:26.04:LTS / kronosnet

Package

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

Affected ranges

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

Affected versions

1.*
1.31-1ubuntu2
1.32-1ubuntu1
1.33-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libknet1t64",
            "binary_version": "1.33-1ubuntu1"
        },
        {
            "binary_name": "libnozzle1t64",
            "binary_version": "1.33-1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15812.json"