# CVE-2025-54349: In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow. CVE-2025-54349 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: High. - Web page: https://patchblox.com/security/cve/CVE-2025-54349 - Priority: High - CVSS: 10.0 (Moderate) - EPSS: 0.0047 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Aug 2, 2025 - Weakness: Off-by-one Error - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54349 ## 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. ## 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 11.6 (bullseye) | 3.9-1+deb11u3 | [DLA-4281-1](https://patchblox.com/security/data/fix/linux/dla-4281-1.md) | Aug 24, 2025 | | Linux | iperf3 Debian 12.15 (bookworm) | 3.12-1+deb12u2 | [DEBIAN-CVE-2025-54349](https://patchblox.com/security/data/fix/linux/debian-cve-2025-54349.md) | Aug 3, 2025 | | Linux | iperf3 Debian 13.5 (trixie) | 3.18-2+deb13u1 | [DEBIAN-CVE-2025-54349](https://patchblox.com/security/data/fix/linux/debian-cve-2025-54349.md) | Aug 3, 2025 | | Linux | iperf3 Debian 14 | 3.19.1-1 | [DEBIAN-CVE-2025-54349](https://patchblox.com/security/data/fix/linux/debian-cve-2025-54349.md) | Aug 3, 2025 | | Linux | iperf3 RHEL 10 | 3.17.1-4.el10_0.1 | [RHSA-2026:1967](https://patchblox.com/security/data/fix/linux/rhsa-2026-1967.md) | Aug 3, 2025 | | Linux | iperf3 RHEL 8 | 0:3.5-12.el8_10 | [RHSA-2026:1592](https://patchblox.com/security/data/fix/linux/rhsa-2026-1592.md) | Jan 29, 2026 | | Linux | iperf3 RHEL 9 | 0:3.9-14.el9_7.1 | [RHSA-2026:1595](https://patchblox.com/security/data/fix/linux/rhsa-2026-1595.md) | Jan 29, 2026 | | 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 almalinux 10 | 3.17.1-5.el10_1 | [ALSA-2026:1597](https://patchblox.com/security/data/fix/linux/alsa-2026-1597.md) | Jan 29, 2026 | | Linux | iperf3 almalinux 8 | 3.5-12.el8_10 | [ALSA-2026:1592](https://patchblox.com/security/data/fix/linux/alsa-2026-1592.md) | Jan 29, 2026 | | Linux | iperf3 almalinux 9 | 3.9-14.el9_7.1 | [ALSA-2026:1595](https://patchblox.com/security/data/fix/linux/alsa-2026-1595.md) | Jan 29, 2026 | | 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 ol 10 | 0:3.17.1-5.el10_1 | [ELSA-2026-1597](https://patchblox.com/security/data/fix/linux/elsa-2026-1597.md) | Jan 29, 2026 | | Linux | iperf3 ol 8 | 0:3.5-12.el8_10 | [ELSA-2026-1592](https://patchblox.com/security/data/fix/linux/elsa-2026-1592.md) | Jan 29, 2026 | | Linux | iperf3 ol 9 | 0:3.9-14.el9_7.1 | [ELSA-2026-1595](https://patchblox.com/security/data/fix/linux/elsa-2026-1595.md) | Jan 29, 2026 | | Linux | iperf3 rocky 10 | 0:3.17.1-5.el10_1 | [RLSA-2026:1597](https://patchblox.com/security/data/fix/linux/rlsa-2026-1597.md) | Feb 3, 2026 | | Linux | iperf3 rocky 8 | 0:3.5-12.el8_10 | [RLSA-2026:1592](https://patchblox.com/security/data/fix/linux/rlsa-2026-1592.md) | Feb 3, 2026 | | Linux | iperf3 rocky 9 | 0:3.9-14.el9_7.1 | [RLSA-2026:1595](https://patchblox.com/security/data/fix/linux/rlsa-2026-1595.md) | Feb 5, 2026 | | 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 | --- Data as of 2026-11-09T01:18:40Z UTC. 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