VulnerabilityModified

CVE-2025-54349

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

CRITICAL 10.0EPSS 0.38%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.38%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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

CVSS 3.1: 10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS: 0.38% probability · 32th percentile
CISA KEV: Not listed
Weakness: CWE-193
Affected: es/iperf3
Source: cve@mitre.org

References

https://github.com/esnet/iperf/commit/4e5313bab0b9b3fe03513ab54f722c8a3e4b7bdfPatch
https://github.com/esnet/iperf/releases/tag/3.19.1Release Notes
https://lists.debian.org/debian-lts-announce/2025/08/msg00020.html

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.