RLSA-2026:98085: Important: iperf3 security update
Iperf is a tool which can measure maximum TCP bandwidth and tune various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, and data-gram loss.
Security Fix(es):
iperf3: iperf3: Denial of Service via UDP receive worker infinite loop (CVE-2026-102253)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
rocky-linux/iperf3to a version that resolves this vulnerability.Fixed in 0:3.21-2.el10_3.1 - Upgrade
Upgrade
rocky-linux/iperf3-debugsourceto a version that resolves this vulnerability.Fixed in 0:3.21-2.el10_3.1 - Upgrade
Upgrade
rocky-linux/iperf3-debuginfoto a version that resolves this vulnerability.Fixed in 0:3.21-2.el10_3.1
Event History
Frequently Asked Questions
Who can exploit this issue?
The CVSS vector indicates that it is remotely exploitable over the network, requires no privileges, and needs no user interaction. Systems running the affected Rocky Linux iperf3 packages are the relevant exposure population.
What is the impact of successful exploitation?
Successful exploitation can cause a denial of service through an infinite loop in the UDP receive worker. The provided CVSS vector indicates high availability impact, with no confidentiality or integrity impact.
Is a non-default or authenticated setup required for exploitation?
No authentication or special privileges are indicated by the CVSS vector. The advisory data does not state whether a particular iperf3 configuration, such as UDP mode being enabled, is required.
Which packages should be updated?
The advisory lists rocky-linux/iperf3, rocky-linux/iperf3-debugsource, and rocky-linux/iperf3-debuginfo. No fixed version is provided in the supplied data.