Description
In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.
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 |
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 | — |
Advisories 5
- 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
- SUSE-SU-2025:02749-1 Security update for iperf SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2025-1197 Moderate: iperf3 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 29, 2025