iperf3 < 3.22 UDP Receive Worker Infinite Loop DoS
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.
CVE-2026-102253
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-102253
iperf3
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/esnet/iperf",
"vendor": "esnet",
"product": "iperf3",
"versions": [
{
"status": "affected",
"version": "3.14",
"lessThan": "3.22",
"versionType": "custom"
}
],
"packageURL": "pkg:github/esnet/iperf",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-102253
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #5394 · Revision 1
- Added to Heist Feed
- Publisher date