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Fencer Vulns
high 7.5

CVE-2023-38403 json

iperf3 before 3.14 allows peers to cause an integer overflow and heap corruption via a crafted length field.

published 2023-07-17 3 y ago modified 2026-07-18 3 mo ago also EUVD-2023-42220 , JLSEC-2026-759

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

iperf3 before 3.14 allows peers to cause an integer overflow and heap corruption via a crafted length field.

Patch / fix

  • julia iperf_jll 3.21.0+0
  • es iperf3 3.14
  • apple macos 13.6.1
  • iperf3 Debian 12 3.12-1+deb12u1
  • iperf3 Debian 14, Debian 13 3.14-1

debian advisories DEBIAN-CVE-2023-38403

  • iperf3 Ubuntu 22.04 LTS 3.9-1+deb11u1build0.22.04.1
  • iperf3 Ubuntu Pro 16.04 LTS 3.0.11-1ubuntu0.1~esm2
  • iperf3 Ubuntu Pro 18.04 LTS 3.1.3-1ubuntu0.1~esm1
  • iperf3 Ubuntu Pro 20.04 LTS 3.7-3ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2023-38403

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 9 3.9-10.el9_2
  • iperf3 RHEL 8 3.5-7.el8_8
  • iperf3 RHEL 7 3.1.7-3.el7_9
  • iperf3 RHEL 9.0 EUS 3.9-10.el9_0
  • iperf3 RHEL 8.4 TUS, RHEL 8.4 E4S, RHEL 8.4 AUS 3.5-7.el8_4
  • iperf3 RHEL 8.1 E4S 3.5-4.el8_1
  • iperf3 RHEL 8.2 TUS, RHEL 8.2 E4S, RHEL 8.2 AUS 3.5-4.el8_2
  • iperf3 RHEL 8.6 EUS 3.5-7.el8_6

red hat advisories RHSA-2023:4571RHSA-2023:4570RHSA-2023:4431RHSA-2023:4432RHSA-2023:4416RHSA-2023:4415

  • iperf SLE Module for Package Hub 15 SP5, SLE Module for Package Hub 15 SP4, openSUSE Leap 15.5 +2 more 3.15-150000.3.6.1
  • iperf SLE Module for Package Hub 15 SP5, SLE Module for Package Hub 15 SP4, openSUSE Leap 15.5 +3 more 3.5-150000.3.3.1

suse advisories SUSE-SU-2023:3887-1SUSE-SU-2023:2987-1

  • iperf3 AlmaLinux 8 3.5-7.el8_8.alma
  • iperf3 AlmaLinux 9 3.9-10.el9_2.alma

almalinux advisories ALSA-2023:4570ALSA-2023:4571

  • iperf3 Rocky Linux 9 3.9-10.el9_2
  • iperf3 Rocky Linux 8 3.5-7.el8_8

rocky linux advisories RLSA-2023:4571RLSA-2023:4570

  • iperf3 Alpine 3.15 3.10.1-r1
  • iperf3 Alpine 3.16 3.11-r1
  • iperf3 Alpine 3.17 3.12-r1

alpine advisories ALPINE-CVE-2023-38403

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 CBL-Mariner 2.0 3.14-1

azure linux advisories AZL-27672

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-2023-38403 updated cvss 7.5

iperf3: memory allocation hazard and crash

  • Red Hat Enterprise Linux AppStream (v. 8) iperf3 3.5-7.el8_8
    fixed: vendor fix RHSA-2023:4570
  • Red Hat Enterprise Linux AppStream (v. 9) iperf3 3.9-10.el9_2
    fixed: vendor fix RHSA-2023:4571
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) iperf3 3.5-4.el8_2
    fixed: vendor fix RHSA-2023:4415
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) iperf3 3.5-7.el8_4
    fixed: vendor fix RHSA-2023:4432
  • Red Hat Enterprise Linux AppStream E4S (v. 8.1) iperf3 3.5-4.el8_1
    fixed: vendor fix RHSA-2023:4416
  • Red Hat Enterprise Linux AppStream E4S (v. 8.2) iperf3 3.5-4.el8_2
    fixed: vendor fix RHSA-2023:4415
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) iperf3 3.5-7.el8_4
    fixed: vendor fix RHSA-2023:4432
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) iperf3 3.5-7.el8_6
    fixed: vendor fix RHSA-2023:4414
show 4 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) iperf3 3.9-10.el9_0
    fixed: vendor fix RHSA-2023:4431
  • Red Hat Enterprise Linux AppStream TUS (v. 8.2) iperf3 3.5-4.el8_2
    fixed: vendor fix RHSA-2023:4415
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) iperf3 3.5-7.el8_4
    fixed: vendor fix RHSA-2023:4432
  • Red Hat Enterprise Linux Client (v. 7) iperf3 3.1.7-3.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) iperf3 3.1.7-3.el7_9 Red Hat Enterprise Linux ComputeNode Optional (v. 7) iperf3 3.1.7-3.el7_9 Red Hat Enterprise Linux Server (v. 7) iperf3 3.1.7-3.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) iperf3 3.1.7-3.el7_9 Red Hat Enterprise Linux Workstation (v. 7) iperf3 3.1.7-3.el7_9
    +1 more products
    Red Hat Enterprise Linux Workstation Optional (v. 7) iperf3 3.1.7-3.el7_9
    fixed: vendor fix RHSA-2023:4326

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
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.96% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

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

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

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.