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Fencer Intel
low 3.7

CVE-2025-54350 json

In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.

published last yr. modified 3mo ago also EUVD-2025-23457 , JLSEC-2026-763

cvss
3.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.

Patch / fix

  • julia iperf_jll 3.21.0+0
  • ES iperf3 3.19.1
  • iperf3 Debian 12 3.12-1+deb12u2
  • iperf3 Debian 13 3.18-2+deb13u1
  • iperf3 Debian 14 3.19.1-1

debian advisories DEBIAN-CVE-2025-54350

  • iperf3 Ubuntu 22.04 LTS 3.9-1+deb11u1ubuntu0.1
  • iperf3 Ubuntu 25.10 3.18-2ubuntu0.1
  • iperf3 Ubuntu Pro 20.04 LTS 3.7-3ubuntu0.1~esm2
  • iperf3 Ubuntu Pro 24.04 LTS 3.16-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2025-54350

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • iperf SLE Module for Package Hub 15 SP7, SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 +1 more 3.19.1-150000.3.15.1

suse advisories SUSE-SU-2025:02749-1

  • iperf openSUSE Tumbleweed 3.19.1-1.1

opensuse advisories openSUSE-SU-2025:15414-1

  • iperf3 Alpine 3.24, Alpine 3.23, Alpine 3.22 3.19.1-r0

alpine advisories ALPINE-CVE-2025-54350

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • iperf3 Azure Linux 3.0 3.17.1-3
  • iperf3 CBL-Mariner 2.0 3.18-2

azure linux advisories AZL-66057AZL-66068

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-54350 updated cvss 3.7

iperf3: iperf Authentication Decode Failure

  • Red Hat Enterprise Linux 7 iperf3 Red Hat Enterprise Linux 8 iperf3 Red Hat Enterprise Linux 9 iperf3 Red Hat Enterprise Linux 10 iperf3
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
OSV 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem package affected fixed in
julia iperf_jll
<3.21.0+0
3.21.0+0

Affected products

  • ES iperf3

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.