Upstream information
Description
iperf3 versions prior to 3.22 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash-loop the server's UDP receive worker into an unrecoverable infinite loop by sending a single crafted control-channel parameter message followed by one 16-byte UDP datagram. Attackers can permanently pin the affected per-stream receive thread at approximately 100% CPU usage, rendering the server unusable until forcibly killed with SIGKILL, as the process does not respond to normal control-channel closure.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having important severity.
| CVSS detail | CNA (VulnCheck) | SUSE |
|---|---|---|
| Base Score | 7.5 | 7.5 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | None | None |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | CNA (VulnCheck) | SUSE |
|---|---|---|
| Base Score | 8.7 | 8.7 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Attack Requirements | None | None |
| Privileges Required | None | None |
| User Interaction | None | None |
| Vulnerable System Confidentiality Impact | None | None |
| Vulnerable System Integrity Impact | None | None |
| Vulnerable System Availability Impact | High | High |
| Subsequent System Confidentiality Impact | None | None |
| Subsequent System Integrity Impact | None | None |
| Subsequent System Availability Impact | None | None |
| CVSSv4 Version | 4.0 | 4.0 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | iperf | Affected |
| SUSE Linux Enterprise Server 16.0 | iperf | Affected |
| SUSE Linux Enterprise Server 16.1 | iperf | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | iperf | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | iperf | Affected |
| SUSE Linux Micro Extras 6.0 | iperf | Affected |
| SUSE Linux Micro Extras 6.1 | iperf | Affected |
| SUSE Linux Micro Extras 6.2 | iperf | Affected |
| openSUSE Leap 16.0 | iperf | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Enterprise Storage 6 | iperf | Affected |
| SUSE Enterprise Storage 7 | iperf | Affected |
| SUSE Enterprise Storage 7.1 | iperf | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP4 | iperf | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | iperf | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | iperf | Affected |
| openSUSE Leap 15.3 | iperf | Affected |
| openSUSE Leap 15.4 | iperf | Affected |
| openSUSE Leap 15.5 | iperf | Affected |
| openSUSE Leap 15.6 | iperf | Affected |
| Products at an unknown state of their lifecycle. | ||
| SUSE Linux Enterprise Server for NVIDIA 16.1 | iperf | Affected |
SUSE Timeline for this CVE
CVE page created: Wed Sep 30 20:02:12 2026CVE page last modified: Thu Oct 1 18:51:46 2026