CVE-2025-54349
published 2025-08-03CVE-2025-54349: In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
PriorityP354critical10CVSS 3.1
AVNACLPRNUINSCCHIHAH
EPSS
0.38%
30.1th percentile
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | iperf3 | < iperf3 3.12-1+deb12u2 (bookworm) | iperf3 3.12-1+deb12u2 (bookworm) |
| es | iperf3 | < 3.19.1 | 3.19.1 |
| es | iperf3 | >= 0 < 3.9-1+deb11u3 | 3.9-1+deb11u3 |
| es | iperf3 | >= 0 < 3.12-1+deb12u2 | 3.12-1+deb12u2 |
| es | iperf3 | >= 0 < 3.18-2+deb13u1 | 3.18-2+deb13u1 |
| es | iperf3 | >= 0 < 3.19.1-1 | 3.19.1-1 |
| es | iperf3 | >= 0 < 3.9-1+deb11u1ubuntu0.1 | 3.9-1+deb11u1ubuntu0.1 |
| es | iperf3 | >= 0 < 3.18-2ubuntu0.1 | 3.18-2ubuntu0.1 |
| es | iperf3 | >= 0 < 3.7-3ubuntu0.1~esm2 | 3.7-3ubuntu0.1~esm2 |
| es | iperf3 | >= 0 < 3.16-1ubuntu0.1~esm1 | 3.16-1ubuntu0.1~esm1 |
| es | iperf3 | >= 3.2 < 3.19.1 | 3.19.1 |
| msrc | azl3_iperf3_3.17.1-3_on_azure_linux_3.0 | — | — |
| msrc | cbl2_iperf3_3.18-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_iperf3_3.18-2_on_cbl_mariner_2.0 | — | — |
CVSS provenance
nvdv3.110.0CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
osv10.0CRITICAL
vendor_debian6.5MEDIUM
vendor_msrc6.5MEDIUM
vendor_redhat6.5MEDIUM
vendor_ubuntu5.3MEDIUM
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Ubuntu
iperf3 vulnerabilities
vendor_ubuntu·2026-01-21·CVSS 5.3
CVE-2024-26306 [MEDIUM] iperf3 vulnerabilities
Title: iperf3 vulnerabilities
Summary: Several security issues were fixed in iperf3.
Jorge Sancho Larraz discovered that iperf3 did not properly manage certain
inputs, which could cause the server process to stop responding, waiting
for input on the control connection. A remote attacker could possibly use
this issue to cause a denial of service. This issue was only addressed in
Ubuntu 22.04 LTS. (CVE-2023-7250)
It was discovered that iperf3 had a timing side-channel when performing RSA
decryption. An attacker could possibly use this issue to recover sensitive
information. This issue was only addressed in Ubuntu 20.04 LTS and Ubuntu
22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-26306)
It was discovered that iperf3 incorrectly handled certain inputs. An
attacker could possibly use this issue
Microsoft
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
vendor_msrc·2025-08-12·CVSS 6.5
CVE-2025-54349 [MEDIUM] CWE-193 In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
mitre: mitre
Customer Action Required: Yes
Remediation:
Red Hat
iperf3: iperf Heap Buffer Overflow
vendor_redhat·2025-08-03·CVSS 6.5
CVE-2025-54349 [MEDIUM] CWE-193 iperf3: iperf Heap Buffer Overflow
iperf3: iperf Heap Buffer Overflow
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
A flaw was found in iperf3. An off-by-one error in the `iperf_auth.c` file leads to a heap-based buffer overflow, potentially allowing a network attacker to trigger an application-level denial of service. This overflow occurs during the processing of authentication data. The vulnerability can only be exploited with direct network access.
Mitigation: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Package: iperf3 (Red Hat Enterprise Linux 7) - Not affected
Debian
CVE-2025-54349: iperf3 - In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-...
vendor_debian·2025·CVSS 6.5
CVE-2025-54349 [MEDIUM] CVE-2025-54349: iperf3 - In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-...
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
Scope: local
bookworm: resolved (fixed in 3.12-1+deb12u2)
bullseye: resolved (fixed in 3.9-1+deb11u3)
forky: resolved (fixed in 3.19.1-1)
sid: resolved (fixed in 3.19.1-1)
trixie: resolved (fixed in 3.18-2+deb13u1)
OSV
iperf3 vulnerabilities
osv·2026-01-21·CVSS 5.3
CVE-2023-7250 [MEDIUM] iperf3 vulnerabilities
iperf3 vulnerabilities
Jorge Sancho Larraz discovered that iperf3 did not properly manage certain
inputs, which could cause the server process to stop responding, waiting
for input on the control connection. A remote attacker could possibly use
this issue to cause a denial of service. This issue was only addressed in
Ubuntu 22.04 LTS. (CVE-2023-7250)
It was discovered that iperf3 had a timing side-channel when performing RSA
decryption. An attacker could possibly use this issue to recover sensitive
information. This issue was only addressed in Ubuntu 20.04 LTS and Ubuntu
22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-26306)
It was discovered that iperf3 incorrectly handled certain inputs. An
attacker could possibly use this issue to cause a denial of service. This
issue was only addressed in
GHSA
GHSA-8xx8-qrh3-q8mq: In iperf before 3
ghsa_unreviewed·2025-08-03
CVE-2025-54349 [MEDIUM] CWE-193 GHSA-8xx8-qrh3-q8mq: In iperf before 3
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
OSV
CVE-2025-54349: In iperf before 3
osv·2025-08-03·CVSS 10.0
CVE-2025-54349 [CRITICAL] CVE-2025-54349: In iperf before 3
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2025-54349 iperf3: iperf Heap Buffer Overflow [fedora-42]
bugzilla·2025-08-04·CVSS 10.0
CVE-2025-54349 [CRITICAL] CVE-2025-54349 iperf3: iperf Heap Buffer Overflow [fedora-42]
CVE-2025-54349 iperf3: iperf Heap Buffer Overflow [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
The following link provides references to all essential vulnerability management information. If something is wrong or missing, please contact a member of PSIRT.
https://spaces.redhat.com/display/PRODSEC/Vulnerability+Management+-+Essential+Documents+for+Engineering+Teams
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that
Bugzilla
CVE-2025-54349 iperf3: iperf Heap Buffer Overflow
bugzilla·2025-08-03·CVSS 10.0
CVE-2025-54349 [CRITICAL] CVE-2025-54349 iperf3: iperf Heap Buffer Overflow
CVE-2025-54349 iperf3: iperf Heap Buffer Overflow
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8
Via RHSA-2026:1592 https://access.redhat.com/errata/RHSA-2026:1592
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2026:1595 https://access.redhat.com/errata/RHSA-2026:1595
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 10
Via RHSA-2026:1597 https://access.redhat.com/errata/RHSA-2026:1597
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9.6 Extended Update Support
Via RHSA-2026:1760 https://access.redhat.c
2025-08-03
Published