UBUNTU-CVE-2026-93010

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Source
https://ubuntu.com/security/CVE-2026-93010
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93010.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-93010
Upstream
  • CVE-2026-93010
Published
2026-10-30T00:00:00Z
Modified
2026-10-31T03:30:14Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in dnsmasq. When DHCP leasequery is enabled without listing allowed source addresses, the server does not check who sent the query. A host on the local network can request DHCP lease records and learn assigned addresses, MAC addresses, hostnames, and related lease metadata. The feature is off unless an administrator turns it on.

References

Affected packages

Ubuntu:22.04:LTS
dnsmasq

Package

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

Affected ranges

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

Affected versions

2.*
2.85-1ubuntu2
2.86-1.1
2.86-1.1ubuntu0.1
2.86-1.1ubuntu0.2
2.86-1.1ubuntu0.3
2.86-1.1ubuntu0.4
2.86-1.1ubuntu0.5
2.90-0ubuntu0.22.04.1
2.90-0ubuntu0.22.04.3
2.90-0ubuntu0.22.04.4
2.91-0ubuntu0.22.04.1
2.91-0ubuntu0.22.04.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "dnsmasq",
            "binary_version": "2.91-0ubuntu0.22.04.2"
        },
        {
            "binary_name": "dnsmasq-base",
            "binary_version": "2.91-0ubuntu0.22.04.2"
        },
        {
            "binary_name": "dnsmasq-base-lua",
            "binary_version": "2.91-0ubuntu0.22.04.2"
        },
        {
            "binary_name": "dnsmasq-utils",
            "binary_version": "2.91-0ubuntu0.22.04.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93010.json"
Ubuntu:24.04:LTS
dnsmasq

Package

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

Affected ranges

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

Affected versions

2.*
2.89-1
2.90-2
2.90-2build1
2.90-2build2
2.90-2ubuntu0.1
2.90-2ubuntu0.3
2.90-2ubuntu0.4
2.91-0ubuntu0.24.04.1
2.91-0ubuntu0.24.04.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "dnsmasq",
            "binary_version": "2.91-0ubuntu0.24.04.2"
        },
        {
            "binary_name": "dnsmasq-base",
            "binary_version": "2.91-0ubuntu0.24.04.2"
        },
        {
            "binary_name": "dnsmasq-base-lua",
            "binary_version": "2.91-0ubuntu0.24.04.2"
        },
        {
            "binary_name": "dnsmasq-utils",
            "binary_version": "2.91-0ubuntu0.24.04.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93010.json"
Ubuntu:26.04:LTS
dnsmasq

Package

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

Affected ranges

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

Affected versions

2.*
2.91-1build1
2.92~rc3-1
2.92-1
2.92-1ubuntu0.2
2.92-1ubuntu0.3
2.92-1ubuntu0.4
2.92-1ubuntu0.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "dnsmasq",
            "binary_version": "2.92-1ubuntu0.5"
        },
        {
            "binary_name": "dnsmasq-base",
            "binary_version": "2.92-1ubuntu0.5"
        },
        {
            "binary_name": "dnsmasq-base-lua",
            "binary_version": "2.92-1ubuntu0.5"
        },
        {
            "binary_name": "dnsmasq-utils",
            "binary_version": "2.92-1ubuntu0.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93010.json"
Ubuntu:26.10
dnsmasq

Package

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

Affected ranges

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

Affected versions

2.*
2.92-1
2.93-1
2.93-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "dnsmasq",
            "binary_version": "2.93-3ubuntu1"
        },
        {
            "binary_name": "dnsmasq-base",
            "binary_version": "2.93-3ubuntu1"
        },
        {
            "binary_name": "dnsmasq-base-lua",
            "binary_version": "2.93-3ubuntu1"
        },
        {
            "binary_name": "dnsmasq-utils",
            "binary_version": "2.93-3ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93010.json"
Ubuntu:Pro:14.04:LTS
dnsmasq

Package

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

Affected ranges

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

Affected versions

2.*
2.66-4ubuntu1
2.67-1
2.68-1
2.68-1ubuntu0.1
2.68-1ubuntu0.2
2.68-1ubuntu0.2+esm1
2.68-1ubuntu0.2+esm2
2.68-1ubuntu0.2+esm3
2.68-1ubuntu0.2+esm5
2.68-1ubuntu0.2+esm6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "dnsmasq",
            "binary_version": "2.68-1ubuntu0.2+esm6"
        },
        {
            "binary_name": "dnsmasq-base",
            "binary_version": "2.68-1ubuntu0.2+esm6"
        },
        {
            "binary_name": "dnsmasq-utils",
            "binary_version": "2.68-1ubuntu0.2+esm6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93010.json"
Ubuntu:Pro:16.04:LTS
dnsmasq

Package

Name
dnsmasq
Purl
pkg:deb/ubuntu/dnsmasq?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.*
2.75-1
2.75-1ubuntu0.16.04.1
2.75-1ubuntu0.16.04.2
2.75-1ubuntu0.16.04.3
2.75-1ubuntu0.16.04.4
2.75-1ubuntu0.16.04.5
2.75-1ubuntu0.16.04.7
2.75-1ubuntu0.16.04.8
2.75-1ubuntu0.16.04.10
2.75-1ubuntu0.16.04.10+esm1
2.79-1ubuntu0.16.04.1+esm1
2.79-1ubuntu0.16.04.1+esm2
2.90-0ubuntu0.16.04.1+esm1
2.90-0ubuntu0.16.04.1+esm3
2.90-0ubuntu0.16.04.1+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "dnsmasq",
            "binary_version": "2.90-0ubuntu0.16.04.1+esm4"
        },
        {
            "binary_name": "dnsmasq-base",
            "binary_version": "2.90-0ubuntu0.16.04.1+esm4"
        },
        {
            "binary_name": "dnsmasq-base-lua",
            "binary_version": "2.90-0ubuntu0.16.04.1+esm4"
        },
        {
            "binary_name": "dnsmasq-utils",
            "binary_version": "2.90-0ubuntu0.16.04.1+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93010.json"
Ubuntu:Pro:18.04:LTS
dnsmasq

Package

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

Affected ranges

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

Affected versions

2.*
2.78-1
2.78-3
2.79-1
2.79-1ubuntu0.2
2.79-1ubuntu0.3
2.79-1ubuntu0.4
2.79-1ubuntu0.5
2.79-1ubuntu0.6
2.79-1ubuntu0.7
2.90-0ubuntu0.18.04.1+esm1
2.90-0ubuntu0.18.04.1+esm3
2.90-0ubuntu0.18.04.1+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "dnsmasq",
            "binary_version": "2.90-0ubuntu0.18.04.1+esm4"
        },
        {
            "binary_name": "dnsmasq-base",
            "binary_version": "2.90-0ubuntu0.18.04.1+esm4"
        },
        {
            "binary_name": "dnsmasq-base-lua",
            "binary_version": "2.90-0ubuntu0.18.04.1+esm4"
        },
        {
            "binary_name": "dnsmasq-utils",
            "binary_version": "2.90-0ubuntu0.18.04.1+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93010.json"
Ubuntu:Pro:20.04:LTS
dnsmasq

Package

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

Affected ranges

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

Affected versions

2.*
2.80-1ubuntu2
2.80-1ubuntu4
2.80-1.1ubuntu1
2.80-1.1ubuntu1.2
2.80-1.1ubuntu1.3
2.80-1.1ubuntu1.4
2.80-1.1ubuntu1.5
2.80-1.1ubuntu1.6
2.80-1.1ubuntu1.7
2.90-0ubuntu0.20.04.1
2.90-0ubuntu0.20.04.1+esm2
2.90-0ubuntu0.20.04.1+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "dnsmasq",
            "binary_version": "2.90-0ubuntu0.20.04.1+esm3"
        },
        {
            "binary_name": "dnsmasq-base",
            "binary_version": "2.90-0ubuntu0.20.04.1+esm3"
        },
        {
            "binary_name": "dnsmasq-base-lua",
            "binary_version": "2.90-0ubuntu0.20.04.1+esm3"
        },
        {
            "binary_name": "dnsmasq-utils",
            "binary_version": "2.90-0ubuntu0.20.04.1+esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93010.json"