This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-71218 →
DEBIAN-CVE-2026-71218
A flaw was found in iperf3. A remote unauthenticated attacker can exploit a vulnerability in the `JSON_read()` function, which accepts a peer-controll...
Original description
The description as published by the source.
A flaw was found in iperf3. A remote unauthenticated attacker can exploit a vulnerability in the JSON_read() function, which accepts a peer-controlled message length and allocates memory without an upper bound. This allows the attacker to trigger excessive memory consumption, leading to a Denial of Service (DoS) through memory exhaustion, severe slowdown, or termination of the iperf3 service.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
iperf3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
iperf3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.18-1"}]}]
Debian:14
iperf3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.18-1"}]}]
References
- advisory security-tracker.debian.org