How severe is CVE-2023-38403?

CVE-2023-38403 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-38403 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-38403?

CVE-2023-38403 primarily affects Es Iperf3. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-38403?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-38403 published?

CVE-2023-38403 was published on 2023-07-17 and last updated on 2026-06-17.

CVE-2023-38403

CVE-2023-38403 is a high-severity vulnerability in Es Iperf3 with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Es Iperf3
Published: 2023-07-17
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2023-38403?: iperf3 before 3.14 allows peers to cause an integer overflow and heap corruption via a crafted length field.
How severe is CVE-2023-38403?: CVE-2023-38403 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-38403 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-38403?: CVE-2023-38403 primarily affects Es Iperf3. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-38403?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-38403 published?: CVE-2023-38403 was published on 2023-07-17 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:a:es:iperf3:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:9.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:14.0:*:*:*:*:*:*:*

More vulnerabilities in Es Iperf3

CVE-2016-4303 — Critical (CVSS 9.8): The parse_string function in cjson.c in the cJSON library mishandles UTF8/16 strings, which allows remote attackers to…
CVE-2025-54351 — High (CVSS 8.9): In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in recv).
CVE-2024-53580 — High (CVSS 7.5): iperf v3.17.1 was discovered to contain a segmentation violation via the iperf_exchange_parameters() function.
CVE-2025-54349 — Medium (CVSS 6.5): In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
CVE-2024-26306 — Medium (CVSS 5.9): iPerf3 before 3.17, when used with OpenSSL before 3.2.0 as a server with RSA authentication, allows a timing side…
CVE-2023-7250 — Medium (CVSS 5.3): A flaw was found in iperf, a utility for testing network performance using TCP, UDP, and SCTP. A malicious or…

All CVEs affecting Es Iperf3 →

Other CWE-190 (Integer Overflow or Wraparound) vulnerabilities

CVE-2026-4689 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was…
CVE-2026-24814 — Critical (CVSS 10.0): Integer Overflow or Wraparound vulnerability in swoole swoole-src (thirdparty/hiredis modules). This vulnerability is…
CVE-2025-64721 — Critical (CVSS 10.0): Sandboxie is a sandbox-based isolation software for 32-bit and 64-bit Windows NT-based operating systems. In versions…
CVE-2015-5108 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
CVE-2015-5097 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
CVE-2013-2555 — Critical (CVSS 10.0): Integer overflow in Adobe Flash Player before 10.3.183.75 and 11.x before 11.7.700.169 on Windows and Mac OS X, before…

Browse all CWE-190 (Integer Overflow or Wraparound) vulnerabilities →