Iperf3
CVE-2025-54351
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V13 - Configuration Unprotected alternate channel
|
| Impact | CVSS score of 8.9 (HIGH). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.05%. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system. |
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Alert meAnalysisAIv1 – Mar 28, 2026
In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in recv). Rated high severity (CVSS 8.9), this vulnerability is remotely exploitable, no authentication required.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
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Technical ContextAI · show details
This vulnerability is classified under CWE-420. In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in recv). Affected products include: Es Iperf3. Version information: before 3.19.1.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in recv).
Executive ViewAI
Organizations using iperf face significant risk from CVE-2025-54351 rated CVSS 8.9. Successful exploitation could significantly impact the confidentiality, integrity, or availability of affected systems. A patch is available and should be applied as part of regular vulnerability management.
Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Affected Products (CPE)CVE.org
The parse_string function in cjson.c in the cJSON library mishandles UTF8/16 strings, which allows remote attackers to c
iperf v3.17.1 was discovered to contain a segmentation violation via the iperf_exchange_parameters() function. Rated hig
Remote unauthenticated heap use-after-free in iperf3 3.21 can let an attacker crash or potentially execute code on an ex
Heap-based buffer overflow in iperf3 3.20 and 3.21 allows an unauthenticated remote client to overrun a 256-byte RSA buf
Denial of service in iperf3 prior to 3.22 allows unauthenticated remote attackers to permanently pin a UDP receive worke
iperf3 before 3.14 allows peers to cause an integer overflow and heap corruption via a crafted length field. Rated high
iPerf3 before 3.17, when used with OpenSSL before 3.2.0 as a server with RSA authentication, allows a timing side channe
In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authenti
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow. Rated medium seve
Same weakness CWE-420 – Unprotected Alternate Channel
View allSame technique Buffer Overflow
View allVendor StatusVendor
SUSE
Severity: High| Product | Status |
|---|---|
| Container suse/sl-micro/6.0/baremetal-os-container:latest Container suse/sl-micro/6.0/base-os-container:latest Container suse/sl-micro/6.0/kvm-os-container:latest Container suse/sl-micro/6.0/rt-os-container:latest | Affected |
| SUSE Enterprise Storage 7.1 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | Fixed |
| SUSE Linux Enterprise Server 16.0 | Fixed |
| openSUSE Leap 15.6 | Fixed |
| openSUSE Tumbleweed | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | Fixed |
| SUSE Linux Enterprise Server 16.0 | Fixed |
| SUSE Linux Enterprise Server 16.1 | Fixed |
| SUSE Linux Enterprise Server for SAP applications 16.0 | Fixed |
| SUSE Linux Enterprise Server for SAP applications 16.1 | Fixed |
| openSUSE Leap 15.6 | Fixed |
| SUSE Enterprise Storage 6 | Fixed |
| SUSE Enterprise Storage 7 | Fixed |
| SUSE Enterprise Storage 7.1 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP4 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | Fixed |
| openSUSE Leap 15.3 | Fixed |
| openSUSE Leap 15.4 | Fixed |
| openSUSE Leap 15.5 | Fixed |
| SUSE Linux Micro Extras 6.0 | Fixed |
| SUSE Linux Micro Extras 6.1 | Fixed |
| SUSE Linux Micro Extras 6.2 | Fixed |
GitHub PoC
Exploit-DB