TI-2025-34172 Aliases CVE-2025-54350 GHSA-r6x8-74x9-5mc9

Reachable assertion in ES iperf3

LOW 25CWE-617Published 2025-08-03 · Updated 2025-11-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: Partial Red Hat: 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-617.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00478 41st percentileScored 2026-11-07

Fix Partial iperf3 (ES): 3.19.1Red Hat: 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ES	iperf3	before 3.19.1	3.19.1	Patch available	CNA

iperf3 VendorES Affected before 3.19.1 Fixed in 3.19.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:es:iperf3::::::::	3.2 to before 3.19.1	Vulnerable	ES

cpe:2.3:a:es:iperf3:*:*:*:*:*:*:*:* Versions 3.2 to before 3.19.1 Vulnerable ·ES

Remediation

Fix · CNA iperf3 (ES) Fixed in 3.19.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2025-08-03
ES iperf3 3.19.1
3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2025-34173 In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in recv).Priority MEDIUM 43
- TI-2025-34171 In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.Priority MEDIUM 43
Show all 3 records →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 7	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2025-54350
2026-10-03 Alias added: GHSA-r6x8-74x9-5mc9

References

Patch 1

https://github.com/esnet/iperf/commit/4eab661da0bbaac04493fa40164e928c6df7934a

Other 1

https://github.com/esnet/iperf/releases/tag/3.19.1

TI-2024-35847 iperf v3.17.1 was discovered to contain a segmentation violation via the iperf_exchange_parameters() function. CVSS 3.1HIGH 7.5
TI-2016-03690 The parse_string function in cjson.c in the cJSON library mishandles UTF8/16 strings… CVSS 3.1CRITICAL 9.8
TI-2025-34173 In iperf before 3.19.1, net.c has a buffer overflow when --skip-rx-copy is used (for MSG_TRUNC in recv). CVSS 3.1CRITICAL 10.0
TI-2025-34171 In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow. CVSS 3.1CRITICAL 10.0
TI-2023-19787 iperf3 before 3.14 allows peers to cause an integer overflow and heap corruption via a crafted length field. CVSS 3.1HIGH 7.5
TI-2024-17387 iPerf3 before 3.17, when used with OpenSSL before 3.2.0 as a server with RSA… CVSS 3.1MEDIUM 5.9

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences