CVE-2026-101283
iperf3 3.20–3.21 (esnet/iperf) has a pre-auth heap buffer overflow in decrypt_rsa_message(): a…
- Risk score
- 64/100
- CVSS
- 9.2 v4.0
- Exploit chance (30 days)
- 0.3%
- Published
- 30 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 (guard warns only), so an unauthenticated client overflows the heap via an oversized authtoken; fixed in 3.22
- Affected
- See advisory
- Fix
- Upgrade the product to 3.22 or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 9.2 critical
- Remotely exploitable without logging in
References
Original description
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 (guard warns only), so an unauthenticated client overflows the heap via an oversized authtoken; fixed in 3.22
Last activity 30 Sep 2026. Patch Forecast updates every hour.