Amazon Linux 2023 Security Advisory: ALAS2023-2026-2070
Advisory Released Date: 2026-08-31
Advisory Updated Date: 2026-08-31
Severity:
Important
Issue Overview:
A flaw was found in iperf3. A remote attacker can exploit this vulnerability by sending crafted control-channel JSON with oversized numeric parameters, such as `parallel` and `len`, which are not properly validated by the server. This improper input validation can lead to excessive stream and thread creation, as well as large buffer allocations, causing resource exhaustion. Consequently, this can result in a Denial of Service (DoS) on the affected iperf3 server. (CVE-2026-71217)
Affected Packages:
iperf3
Issue Correction:
Run dnf update iperf3 --releasever 2023.12.20260831 or dnf update --advisory ALAS2023-2026-2070 --releasever 2023.12.20260831 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
iperf3-debugsource-3.19.1-1.amzn2023.0.1.aarch64
iperf3-debuginfo-3.19.1-1.amzn2023.0.1.aarch64
iperf3-3.19.1-1.amzn2023.0.1.aarch64
iperf3-devel-3.19.1-1.amzn2023.0.1.aarch64
src:
iperf3-3.19.1-1.amzn2023.0.1.src
x86_64:
iperf3-devel-3.19.1-1.amzn2023.0.1.x86_64
iperf3-debuginfo-3.19.1-1.amzn2023.0.1.x86_64
iperf3-debugsource-3.19.1-1.amzn2023.0.1.x86_64
iperf3-3.19.1-1.amzn2023.0.1.x86_64