CVE-2025-54349VulnerabilityPublished 2 Feb 2026Updated 8 Oct 2026

SUSE · security update for iperf3

Affects SUSESource GCVE Database

Authoritative record:CVE-2025-54349· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 26 Oct 2026, 09:15 UTC

CVSS 3.1 base score

6.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
SUSE Product Security Team SUSE	Affected Red Hat Red Hat Enterprise Linux Red Hat Enterprise Linux AppStream (v. 8) aarch64 iperf3-0:3.5-12.el8_10.aarch64 SUSE i686 iperf3-0:3.9-14.el9_6.1.i686 x86_64 iperf3-0:3.9-14.el9_6.1.x86_64	Fixed in–

AI-suggested

Red Hat has released updated iperf3 packages (version 3.5-12.el8_10) that fix the heap buffer overflow vulnerability. Users running affected versions of Red Hat Enterprise Linux 8 and Extended Life Cycle 8.10 should apply the update as described in Red Hat advisory RHSA-2026:1592. No additional mitigation steps are indicated by the vendor.

Description

Iperf is a tool which can measure maximum TCP bandwidth and tune various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, and data-gram loss. Security Fix(es): * iperf3: iperf Heap Buffer Overflow (CVE-2025-54349) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Impact

The heap buffer overflow vulnerability in iperf3 could allow an attacker to cause memory corruption, which might lead to application crashes or potentially other unintended behavior. The advisory rates the security impact as moderate. There are no known exploits in the wild at this time.

Summary

The vulnerability CVE-2025-54349 is a heap buffer overflow in iperf3, a network performance measurement tool. This flaw could potentially lead to memory corruption. Red Hat has issued a security advisory (RHSA-2026:1592) describing this issue and providing updated iperf3 packages for Red Hat Enterprise Linux 8 and its Extended Life Cycle 8.10 variants on multiple architectures. The advisory rates the impact as moderate and directs users to apply the provided update to fix the issue.

CWE-193Off-by-one Error (opens in a new tab)
Base weakness
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
Implementation
When copying character arrays or using character manipulation methods, the correct size parameter must be used to account for the null terminator that needs to be added at the end of the array.
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 12 Jul 2026, 11:04 UTC

WeaknessesCWE-193

Technical details

References

Community reviews

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