Dashboard / CVE-2026-102253

CVE-2026-102253

HIGH 1 PoC
MEDIUM Priority: 0.04 BB Relevance: 87/100
Published: 2026-09-29 Modified: 2026-11-08 First seen: 2026-11-08 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
AT: None
VC: None
VI: None
VA: High

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
esnet iperf3 3.14 < 3.22

References & Advisories (3)

https://github.com/esnet/iperf/releases/tag/3.22
vendor-advisory patch release-notes

Proof of Concept (1)

—
https://github.com/Ravi-lk/CVE-2026-102253-POC
nomi-sec

Bug Bounty Relevance

87 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction
✓ PoC available (1)

CVSS Score

8.7 / 10.0 v4.0
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

EPSS — Exploitation Probability

0.43%
Raw Score 0.004310
Percentile 37.8%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00431
2026-11-12
0.00431
2026-11-10
0.00431
2026-11-09
0.00431
2026-11-08
0.00431

Intelligence Sources

mitre ref →

External Links