Bug 2543638 (CVE-2026-102253) - CVE-2026-102253 iperf3: iperf3: Denial of Service via UDP receive worker infinite loop
Summary: CVE-2026-102253 iperf3: iperf3: Denial of Service via UDP receive worker infi...
Keywords:
Status: NEW
Alias: CVE-2026-102253
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2544509
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-29 20:36 UTC by OSIDB Bzimport
Modified: 2026-11-11 03:57 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:88207 0 None None None 2026-10-22 13:32:37 UTC
Red Hat Product Errata RHSA-2026:98085 0 None None None 2026-11-11 03:57:00 UTC

Description OSIDB Bzimport 2026-09-29 20:36:59 UTC 
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.
Comment 1 Jon Orris 2026-10-22 13:32:36 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:88207 https://access.redhat.com/errata/RHSA-2026:88207
Comment 2 errata-xmlrpc 2026-11-11 03:56:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:98085 https://access.redhat.com/errata/RHSA-2026:98085
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