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10.0
iperf Buffer Overflow in Authentication Module
JLSEC-2026-762
Summary
The iperf authentication module is vulnerable to a buffer overflow, which could allow an attacker to execute malicious code. This affects users who run iperf, especially in network testing and benchmarking scenarios. Update to iperf version 3.19.1 or later to fix this issue.
What to do
- Update iperf_jll to version 3.21.0+0.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Julia | – | iperf_jll |
< 3.21.0+0 Fix: upgrade to 3.21.0+0
|
Original title
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
Original description
In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow.
Published: 15 Jul 2026 · Updated: 18 Jul 2026 · First seen: 15 Jul 2026