CVE-2025-54349

Publication date 3 August 2025

Last updated 22 January 2026

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

Description

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

Status

Show unmaintained releases

Package	Ubuntu Release	Status
iperf3	25.10 questing	Fixed 3.18-2ubuntu0.1
	25.04 plucky	Ignored end of life, was needs-triage
	24.04 LTS noble	Fixed 3.16-1ubuntu0.1~esm1
	22.04 LTS jammy	Fixed 3.9-1+deb11u1ubuntu0.1
	20.04 LTS focal	Fixed 3.7-3ubuntu0.1~esm2
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
iperf3	Upstream: 4e5313b

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Changed
Confidentiality	Low
Integrity impact	Low
Availability impact	Low
Vector	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L

References

Related Ubuntu Security Notices (USN)

USN-7970-1
iperf3 vulnerabilities
21 January 2026