SUSE-SU-2026:24234-1: important: Security update for iperf

Tue Oct 20 20:42:02 UTC 2026

# Security update for iperf

Announcement ID: SUSE-SU-2026:24234-1  
Release Date: 2026-10-12T12:12:10Z  
Rating: important  
References:

  * bsc#1283528
  * bsc#1283786
  * bsc#1283787
  * bsc#1284404
  * bsc#1284405

Cross-References:

  * CVE-2026-101276
  * CVE-2026-101283
  * CVE-2026-102253
  * CVE-2026-71217
  * CVE-2026-71218

CVSS scores:

  * CVE-2026-101276 ( SUSE ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-101276 ( NVD ):  9.2
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-101283 ( SUSE ):  8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-101283 ( NVD ):  9.2
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-102253 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-102253 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-102253 ( NVD ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-102253 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-71217 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-71217 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-71218 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-71218 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-71218 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

An update that solves five vulnerabilities can now be installed.

## Description:

This update for iperf fixes the following issues:

  * CVE-2026-71217: iperf3 server accepts unbounded peer-controlled JSON
    parameters enabling remote denial of service via resource exhaustion
    (bsc#1284405).
  * CVE-2026-71218: unbounded peer-controlled allocation in JSON_read() allows
    unauthenticated remote memory exhaustion (bsc#1284404).
  * CVE-2026-101276: iperf3 3.21 (esnet/iperf) contains a remote,
    unauthenticated heap use-after-free: the server's per- test watchdog
    server_timer_proc() frees streams without cancelling/joining their worker
    threads (bsc#1283786).
  * CVE-2026-101283: iperf3 3.20--3.21 (esnet/iperf) has a pre-auth heap buffer
    overflow in decrypt_rsa_message(): a 256-byte RSA buffer is BIO_read with
    the attacker-controlled ciphertext length (bsc#1283787).
  * CVE-2026-102253: missing checks in the server's UDP receive worker allows
    unauthenticated remote attackers to cause an infinite loop (bsc#1283528).

Changes for iperf:

  * Updated to version 3.22

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-1903

  * SUSE Linux Enterprise Server 16.0  
    zypper in -t patch SUSE-SLES-16.0-1903

## Package List:

  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * libiperf0-3.21-160000.1.1
    * iperf-devel-3.21-160000.1.1
    * iperf-debuginfo-3.21-160000.1.1
    * libiperf0-debuginfo-3.21-160000.1.1
    * iperf-debugsource-3.21-160000.1.1
    * iperf-3.21-160000.1.1
  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * libiperf0-3.21-160000.1.1
    * iperf-devel-3.21-160000.1.1
    * iperf-debuginfo-3.21-160000.1.1
    * libiperf0-debuginfo-3.21-160000.1.1
    * iperf-debugsource-3.21-160000.1.1
    * iperf-3.21-160000.1.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-101276.html
  * https://www.suse.com/security/cve/CVE-2026-101283.html
  * https://www.suse.com/security/cve/CVE-2026-102253.html
  * https://www.suse.com/security/cve/CVE-2026-71217.html
  * https://www.suse.com/security/cve/CVE-2026-71218.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1283528
  * https://bugzilla.suse.com/show_bug.cgi?id=1283786
  * https://bugzilla.suse.com/show_bug.cgi?id=1283787
  * https://bugzilla.suse.com/show_bug.cgi?id=1284404
  * https://bugzilla.suse.com/show_bug.cgi?id=1284405

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.suse.com/pipermail/sle-security-updates/attachments/20261020/49591447/attachment.htm>