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Debian 11: Critical Heap Buffer Overflow Vulnerability in iperf3 DLA-4281-1

debian lts
Calendar Grey August 24, 2025
Dist Debian Esm H88
Two security flaws in iperf3 addressed, notably a heap buffer overflow and an accessible assert. It is advised to update for Debian 11.
Two vulnerabilities have been fixed in the IP bandwidth measuring tool iperf3

Summary

CVE-2025-54349

heap buffer overflow

CVE-2025-54350

reachable assert

For Debian 11 bullseye, these problems have been fixed in version
3.9-1+deb11u3.

We recommend that you upgrade your iperf3 packages.

For the detailed security status of iperf3 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/iperf3

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS


Severity
critical
Lowest
Low
Medium
High
Critical

Package: iperf3
Version: 3.9-1+deb11u3
CVE ID: CVE-2025-54349 CVE-2025-54350
Debian Bug: 1110376

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