# CVE-2025-54350: In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.

CVE-2025-54350 is fixed in 6 products on 1 platform, first by iperf3 3.7-3ubuntu0.1~esm2, released August 2, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-54350
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0048
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 2, 2025
- Weakness: Reachable Assertion
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54350

## Description

In iperf before 3.19.1, iperf_auth.c has a Base64Decode assertion failure and application exit upon a malformed authentication attempt.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | iperf opensuse-leap 15.6 | 3.19.1-150000.3.15.1 | [SUSE-SU-2025:02749-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02749-1.md) | Aug 11, 2025 |
| Linux | iperf sles 15.6 | 3.19.1-150000.3.15.1 | [SUSE-SU-2025:02749-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02749-1.md) | Aug 11, 2025 |
| Linux | iperf sles 15.7 | 3.19.1-150000.3.15.1 | [SUSE-SU-2025:02749-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02749-1.md) | Aug 11, 2025 |
| Linux | iperf3 Debian 12.15 (bookworm) | 3.12-1+deb12u2 | [DEBIAN-CVE-2025-54350](https://patchblox.com/security/data/fix/linux/debian-cve-2025-54350.md) | Aug 3, 2025 |
| Linux | iperf3 Debian 13.5 (trixie) | 3.18-2+deb13u1 | [DEBIAN-CVE-2025-54350](https://patchblox.com/security/data/fix/linux/debian-cve-2025-54350.md) | Aug 3, 2025 |
| Linux | iperf3 Debian 14 | 3.19.1-1 | [DEBIAN-CVE-2025-54350](https://patchblox.com/security/data/fix/linux/debian-cve-2025-54350.md) | Aug 3, 2025 |
| Linux | iperf3 Ubuntu 20.04 LTS (focal) | 3.7-3ubuntu0.1~esm2 | [iperf3 3.7-3ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-iperf3-3.7-3ubuntu0.1-esm2.md) | Aug 2, 2025 |
| Linux | iperf3 Ubuntu 22.04.1 LTS (jammy) | 3.9-1+deb11u1ubuntu0.1 | [iperf3 3.9-1+deb11u1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-iperf3-3.9-1-deb11u1ubuntu0.1.md) | Aug 2, 2025 |
| Linux | iperf3 Ubuntu 24.04.5 LTS (noble) | 3.16-1ubuntu0.1~esm1 | [iperf3 3.16-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-iperf3-3.16-1ubuntu0.1-esm1.md) | Aug 2, 2025 |
| Linux | iperf3 Ubuntu 25.10 (questing) | 3.18-2ubuntu0.1 | [iperf3 3.18-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-iperf3-3.18-2ubuntu0.1.md) | Aug 2, 2025 |
| Linux | iperf3 amzn 2023 | 3.19.1-1.amzn2023 | [ALAS2023-2025-1197](https://patchblox.com/security/data/fix/linux/alas2023-2025-1197.md) | Sep 17, 2025 |
| Linux | iperf3-debuginfo amzn 2023 | 3.19.1-1.amzn2023 | [ALAS2023-2025-1197](https://patchblox.com/security/data/fix/linux/alas2023-2025-1197.md) | Sep 17, 2025 |
| Linux | iperf3-debugsource amzn 2023 | 3.19.1-1.amzn2023 | [ALAS2023-2025-1197](https://patchblox.com/security/data/fix/linux/alas2023-2025-1197.md) | Sep 17, 2025 |
| Linux | iperf3-devel amzn 2023 | 3.19.1-1.amzn2023 | [ALAS2023-2025-1197](https://patchblox.com/security/data/fix/linux/alas2023-2025-1197.md) | Sep 17, 2025 |
| Linux | libiperf0 Ubuntu 20.04 LTS (focal) | 3.7-3ubuntu0.1~esm2 | [libiperf0 3.7-3ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libiperf0-3.7-3ubuntu0.1-esm2.md) | Aug 2, 2025 |
| Linux | libiperf0 Ubuntu 22.04.1 LTS (jammy) | 3.9-1+deb11u1ubuntu0.1 | [libiperf0 3.9-1+deb11u1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libiperf0-3.9-1-deb11u1ubuntu0.1.md) | Aug 2, 2025 |
| Linux | libiperf0 Ubuntu 24.04.5 LTS (noble) | 3.16-1ubuntu0.1~esm1 | [libiperf0 3.16-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libiperf0-3.16-1ubuntu0.1-esm1.md) | Aug 2, 2025 |
| Linux | libiperf0 Ubuntu 25.10 (questing) | 3.18-2ubuntu0.1 | [libiperf0 3.18-2ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libiperf0-3.18-2ubuntu0.1.md) | Aug 2, 2025 |

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