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Fencer Vulns
medium 6.5

CVE-2025-54349 json

In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.

published 2025-08-03 15 mo ago modified 2026-07-25 3 mo ago also EUVD-2025-23456 , JLSEC-2026-762

cvss
6.5
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 40%
public exploits
0
none known

Summary

In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.

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-2025-54349

  • 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-2025-54349

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

  • iperf3 RHEL 10.1 3.17.1-5.el10_1
  • iperf3 RHEL 9 3.9-14.el9_7.1
  • iperf3 RHEL 8 3.5-12.el8_10
  • iperf3 RHEL 8.6 TUS, RHEL 8.6 E4S, RHEL 8.6 AUS 3.5-7.el8_6.2
  • iperf3 RHEL 8.4 EUS_LONG_LIFE, RHEL 8.4 AUS 3.5-7.el8_4.2
  • iperf3 RHEL 8.8 TUS, RHEL 8.8 E4S 3.5-7.el8_8.2
  • iperf3 RHEL 8.2 AUS 3.5-4.el8_2.2
  • iperf3 enterprise linux eus 10.0 3.17.1-4.el10_0.1

red hat advisories RHSA-2026:2449RHSA-2026:2448RHSA-2026:2328RHSA-2026:2329RHSA-2026:1967RHSA-2026:1882

  • 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 AlmaLinux 8 3.5-12.el8_10
  • iperf3 AlmaLinux 9 3.9-14.el9_7.1
  • iperf3 AlmaLinux 10 3.17.1-5.el10_1

almalinux advisories ALSA-2026:1592ALSA-2026:1595ALSA-2026:1597

  • iperf3 Rocky Linux 9 3.9-14.el9_7.1
  • iperf3 Rocky Linux 10 3.17.1-5.el10_1
  • iperf3 Rocky Linux 8 3.5-12.el8_10

rocky linux advisories RLSA-2026:1595RLSA-2026:1597RLSA-2026:1592

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

alpine advisories ALPINE-CVE-2025-54349

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-66060AZL-66065

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

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-2025-54349 updated cvss 6.5

iperf3: iperf Heap Buffer Overflow

  • Red Hat Enterprise Linux AppStream (v. 8) iperf3 3.5-12.el8_10
    fixed: vendor fix RHSA-2026:1592
  • Red Hat Enterprise Linux AppStream (v. 9) iperf3 3.9-14.el9_7.1
    fixed: vendor fix RHSA-2026:1595
  • Red Hat Enterprise Linux AppStream (v. 10) iperf3 3.17.1-5.el10_1
    fixed: vendor fix RHSA-2026:1597
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) iperf3 3.5-4.el8_2.2
    fixed: vendor fix RHSA-2026:2329
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) iperf3 3.5-7.el8_4.2
    fixed: vendor fix RHSA-2026:2448
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) iperf3 3.5-7.el8_6.2 Red Hat Enterprise Linux AppStream E4S (v.8.6) iperf3 3.5-7.el8_6.2
    fixed: vendor fix RHSA-2026:2449
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) iperf3 3.5-7.el8_8.2
    fixed: vendor fix RHSA-2026:2328
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) iperf3 3.9-10.el9_0.2
    fixed: vendor fix RHSA-2026:1881
show 8 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) iperf3 3.9-10.el9_2.2
    fixed: vendor fix RHSA-2026:1882
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) iperf3 3.17.1-4.el10_0.1
    fixed: vendor fix RHSA-2026:1967
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) iperf3 3.9-11.el9_4.2
    fixed: vendor fix RHSA-2026:1773
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) iperf3 3.9-14.el9_6.1
    fixed: vendor fix RHSA-2026:1760
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) iperf3 3.5-7.el8_4.2
    fixed: vendor fix RHSA-2026:2448
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) iperf3 3.5-7.el8_6.2
    fixed: vendor fix RHSA-2026:2449
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) iperf3 3.5-7.el8_8.2
    fixed: vendor fix RHSA-2026:2328
  • Red Hat Enterprise Linux 7 iperf3
    not affected: vulnerable code not present

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
15 mo ago

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
NVD 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
OSV 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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 Vulns 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.