Description
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ES | iperf3 | < 3.19.1 | 3.19.1 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | iperf3 | 3.19.1-1 | — |
| Debian 13 | iperf3 | 3.18-2+deb13u1 | — |
| Debian 12 | iperf3 | 3.12-1+deb12u2 | — |
| Debian 11 | iperf3 | 3.9-1+deb11u3 | DLA-4281-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | iperf3 | 3.18-2ubuntu0.1 | USN-7970-1 |
| Ubuntu 22.04 LTS | iperf3 | 3.9-1+deb11u1ubuntu0.1 | USN-7970-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | iperf3 | 3.16-1ubuntu0.1~esm1 | USN-7970-1 |
| Ubuntu Pro 20.04 LTS | iperf3 | 3.7-3ubuntu0.1~esm2 | USN-7970-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | iperf3 | 3.17.1-5.el10_1 | RHSA-2026:1597 |
| RHEL 9 | iperf3 | 3.9-14.el9_7.1 | RHSA-2026:1595 |
| RHEL 8 | iperf3 | 3.5-12.el8_10 | RHSA-2026:1592 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | iperf3 | 3.17.1-4.el10_0.1 | RHSA-2026:1967 |
| RHEL 9.6 EUS | iperf3 | 3.9-14.el9_6.1 | RHSA-2026:1760 |
| RHEL 9.4 EUS | iperf3 | 3.9-11.el9_4.2 | RHSA-2026:1773 |
| RHEL 9.2 E4S | iperf3 | 3.9-10.el9_2.2 | RHSA-2026:1882 |
| RHEL 9.0 E4S | iperf3 | 3.9-10.el9_0.2 | RHSA-2026:1881 |
| RHEL 8.8 TUS | iperf3 | 3.5-7.el8_8.2 | RHSA-2026:2328 |
| RHEL 8.8 E4S | iperf3 | 3.5-7.el8_8.2 | RHSA-2026:2328 |
| RHEL 8.6 TUS | iperf3 | 3.5-7.el8_6.2 | RHSA-2026:2449 |
| RHEL 8.6 E4S | iperf3 | 3.5-7.el8_6.2 | RHSA-2026:2449 |
| RHEL 8.6 AUS | iperf3 | 3.5-7.el8_6.2 | RHSA-2026:2449 |
| RHEL 8.4 EUS Long Life | iperf3 | 3.5-7.el8_4.2 | RHSA-2026:2448 |
| RHEL 8.4 AUS | iperf3 | 3.5-7.el8_4.2 | RHSA-2026:2448 |
| RHEL 8.2 AUS | iperf3 | 3.5-4.el8_2.2 | RHSA-2026:2329 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | iperf3 | 3.17.1-5.el10_1 | ALSA-2026:1597 |
| AlmaLinux 9 | iperf3 | 3.9-14.el9_7.1 | ALSA-2026:1595 |
| AlmaLinux 8 | iperf3 | 3.5-12.el8_10 | ALSA-2026:1592 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | iperf3 | 3.17.1-5.el10_1 | RLSA-2026:1597 |
| Rocky Linux 9 | iperf3 | 3.9-14.el9_7.1 | RLSA-2026:1595 |
| Rocky Linux 8 | iperf3 | 3.5-12.el8_10 | RLSA-2026:1592 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | iperf | 3.19.1-150000.3.15.1 | SUSE-SU-2025:02749-1 |
| SLES 15 SP6 | iperf | 3.19.1-150000.3.15.1 | SUSE-SU-2025:02749-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Enterprise Storage 7.1 | iperf | 3.19.1-150000.3.15.1 | SUSE-SU-2025:02749-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | iperf | 3.19.1-1.1 | openSUSE-SU-2025:15414-1 |
| openSUSE Leap 15.6 | iperf | 3.19.1-150000.3.15.1 | SUSE-SU-2025:02749-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | iperf3 | 3.19.1-r0 | — |
| Alpine v3.23 | iperf3 | 3.19.1-r0 | — |
| Alpine v3.22 | iperf3 | 3.19.1-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | iperf3 +1 | 3.19.1-1.amzn2023 | ALAS2023-2025-1197 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | iperf3 | 3.17.1-3 | — |
| Azure Linux 2 (CBL-Mariner) | iperf3 | 3.18-2 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | iperf3 | 3.17.1-5.el10_1 | ELSA-2026-1597 |
| Oracle Linux 9 | iperf3 | 3.9-14.el9_7.1 | ELSA-2026-1595 |
| Oracle Linux 8 | iperf3 | 3.5-12.el8_10 | ELSA-2026-1592 |
Advisories 27
- ALSA-2026:1597 Moderate: iperf3 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:1595 Moderate: iperf3 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:1592 Moderate: iperf3 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:2448 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- RHSA-2026:2449 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- RHSA-2026:2329 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- RHSA-2026:2328 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- RHSA-2026:1967 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- RHSA-2026:1881 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- RHSA-2026:1882 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- RHSA-2026:1773 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- RHSA-2026:1760 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- RHSA-2026:1597 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- RHSA-2026:1595 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- RHSA-2026:1592 Red Hat Security Advisory: iperf3 security update Red Hat Security Advisories (RHSA) · Jul 12, 2026
- USN-7970-1 iperf3 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2025:15414-1 iperf-3.19.1-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4281-1 iperf3 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2026-0258 Red Hat Enterprise Linux (iperf3): Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Feb 17, 2026
- RLSA-2026:1595 Moderate: iperf3 security update Rocky Linux Security Advisories · Feb 5, 2026
- SUSE-SU-2025:02749-1 Security update for iperf SUSE / openSUSE Security Updates · Feb 4, 2026
- RLSA-2026:1597 Moderate: iperf3 security update Rocky Linux Security Advisories · Feb 3, 2026
- RLSA-2026:1592 Moderate: iperf3 security update Rocky Linux Security Advisories · Feb 3, 2026
- ELSA-2026-1597 Moderate: iperf3 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jan 29, 2026
- ELSA-2026-1595 Moderate: iperf3 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jan 29, 2026
- ELSA-2026-1592 Moderate: iperf3 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jan 29, 2026
- ALAS2023-2025-1197 Moderate: iperf3 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 29, 2025