UBUNTU-CVE-2026-71218

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Source
https://ubuntu.com/security/CVE-2026-71218
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71218.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-71218
Upstream
Published
2026-08-13T00:00:00Z
Modified
2026-08-13T19:31:04.046079802Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in iperf3. A remote unauthenticated attacker can exploit a vulnerability in the JSON_read() function, which accepts a peer-controlled message length and allocates memory without an upper bound. This allows the attacker to trigger excessive memory consumption, leading to a Denial of Service (DoS) through memory exhaustion, severe slowdown, or termination of the iperf3 service.

References

Affected packages

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-2026-71218.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-2026-71218.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-2026-71218.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-2026-71218.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-2026-71218.json"