UBUNTU-CVE-2026-71217

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Source
https://ubuntu.com/security/CVE-2026-71217
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71217.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-71217
Upstream
Published
2026-08-13T00:00:00Z
Modified
2026-08-13T19:30:57.942463421Z
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 found in iperf3. A remote attacker can exploit this vulnerability by sending crafted control-channel JSON with oversized numeric parameters, such as parallel and len, which are not properly validated by the server. This improper input validation can lead to excessive stream and thread creation, as well as large buffer allocations, causing resource exhaustion. Consequently, this can result in a Denial of Service (DoS) on the affected iperf3 server.

References

Affected packages

Ubuntu:26.04:LTS
iperf3

Package

Name
iperf3
Purl
pkg:deb/ubuntu/iperf3?arch=source&distro=resolute

Affected ranges

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

Affected versions

3.*
3.18-2
3.19.1-2
3.20-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.20-2",
            "binary_name": "iperf3"
        },
        {
            "binary_version": "3.20-2",
            "binary_name": "libiperf0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71217.json"
Ubuntu:Pro:16.04:LTS
iperf3

Package

Name
iperf3
Purl
pkg:deb/ubuntu/iperf3?arch=source&distro=esm-apps%2Fxenial

Affected ranges

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

Affected versions

3.*
3.0.11-1
3.0.11-1ubuntu0.1~esm1
3.0.11-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.0.11-1ubuntu0.1~esm2",
            "binary_name": "iperf3"
        },
        {
            "binary_version": "3.0.11-1ubuntu0.1~esm2",
            "binary_name": "libiperf0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71217.json"
Ubuntu:Pro:18.04:LTS
iperf3

Package

Name
iperf3
Purl
pkg:deb/ubuntu/iperf3?arch=source&distro=esm-apps%2Fbionic

Affected ranges

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

Affected versions

3.*
3.1.3-1
3.1.3-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.1.3-1ubuntu0.1~esm1",
            "binary_name": "iperf3"
        },
        {
            "binary_version": "3.1.3-1ubuntu0.1~esm1",
            "binary_name": "libiperf0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71217.json"
Ubuntu:Pro:20.04:LTS
iperf3

Package

Name
iperf3
Purl
pkg:deb/ubuntu/iperf3?arch=source&distro=esm-apps%2Ffocal

Affected ranges

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

Affected versions

3.*
3.6-2
3.7-1
3.7-2
3.7-3
3.7-3ubuntu0.1~esm1
3.7-3ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.7-3ubuntu0.1~esm2",
            "binary_name": "iperf3"
        },
        {
            "binary_version": "3.7-3ubuntu0.1~esm2",
            "binary_name": "libiperf0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71217.json"
Ubuntu:Pro:22.04:LTS
iperf3

Package

Name
iperf3
Purl
pkg:deb/ubuntu/iperf3?arch=source&distro=esm-apps%2Fjammy

Affected ranges

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

Affected versions

3.*
3.9-1
3.9-1build1
3.9-1+deb11u1build0.22.04.1
3.9-1+deb11u1ubuntu0.1~esm1
3.9-1+deb11u1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.9-1+deb11u1ubuntu0.1",
            "binary_name": "iperf3"
        },
        {
            "binary_version": "3.9-1+deb11u1ubuntu0.1",
            "binary_name": "libiperf0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71217.json"
Ubuntu:Pro:24.04:LTS
iperf3

Package

Name
iperf3
Purl
pkg:deb/ubuntu/iperf3?arch=source&distro=esm-apps%2Fnoble

Affected ranges

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

Affected versions

3.*
3.14-1
3.15-1
3.16-1
3.16-1build1
3.16-1build2
3.16-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.16-1ubuntu0.1~esm1",
            "binary_name": "iperf3"
        },
        {
            "binary_version": "3.16-1ubuntu0.1~esm1",
            "binary_name": "libiperf0"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71217.json"