CVE-2023-38403

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

Published: 2023-07-17 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-38403 is rated Moderate Risk (56.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.70%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-38403

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.25% 1.70% +0.45%
2 2025-12-24 1.12% 1.25% +0.13%
3 2025-11-21 — 1.12% —

Full EPSS history (25 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-38403

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2023-38403

OS Trackers for CVE-2023-38403

vendor priority summary link
alpine — CVE-2023-38403: 1 source package rows (iperf3); 1 state rows across 1 repos (3.17-main); fixed 1, open 0. https://security.alpinelinux.org/vuln/CVE-2023-38403
debian not yet assigned CVE-2023-38403 not yet assigned priority: Debian including 1 source packages (iperf3), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2023-38403
redhat high — https://access.redhat.com/security/cve/CVE-2023-38403
suse high CVE-2023-38403 severity important: SUSE including 16 source package names (iperf-3.14-1.1, iperf-3.15-150000.3.6.1, …), 40 product×package rows across 16 product lines (SUSE Enterprise Storage 7, SUSE Enterprise Storage 7.1, … (16 product lines)): Fixed 40. https://www.suse.com/security/cve/CVE-2023-38403/
ubuntu medium CVE-2023-38403 medium priority: Ubuntu including 1 source packages (iperf3), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 5, released 5, needs-triage 3. https://ubuntu.com/security/CVE-2023-38403

Affected software / configurations for CVE-2023-38403

Vendor Product Version Raw CPE
es iperf3 < 3.14 cpe:2.3:a:es:iperf3:*:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
fedoraproject fedora 37 cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
fedoraproject fedora 38 cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
netapp ontap_select_deploy_administration_utility — cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
netapp clustered_data_ontap 9.0 cpe:2.3:o:netapp:clustered_data_ontap:9.0:*:*:*:*:*:*:*
apple macos < 13.6.1 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos 14.0 cpe:2.3:o:apple:macos:14.0:*:*:*:*:*:*:*

References for CVE-2023-38403

URL Tags
http://seclists.org/fulldisclosure/2023/Oct/24 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/26 Mailing List Third Party Advisory
https://bugs.debian.org/1040830 Third Party Advisory
https://cwe.mitre.org/data/definitions/130.html Third Party Advisory
https://downloads.es.net/pub/iperf/esnet-secadv-2023-0001.txt.asc Vendor Advisory
https://github.com/esnet/iperf/commit/0ef151550d96cc4460f98832df84b4a1e87c65e9 Patch
https://github.com/esnet/iperf/issues/1542 Issue Tracking Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/07/msg00025.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BV6EBWWF4PEQKROEVXGYSTIT2MGBTLU7/ Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M25Z5FHTO3XWMGP37JHJ7IIIHSGCLKEV/ Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20230818-0016/ Third Party Advisory
https://support.apple.com/kb/HT213984 Release Notes Third Party Advisory
https://support.apple.com/kb/HT213985 Release Notes Third Party Advisory
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