by Kastro
Paper/Archive/CVE-2026-101283

CVE-2026-101283

esnet iperf3 — 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 a…

EPSS 0.4%CVSS 9.2
critical.is priorityof 100
34
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 32.3.323 × 206.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
iperf33.20–CNA
iperf33.21–CNA

Scores by source

Anthropic (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refnewreleases.io/project/github/esnet/iperf/release/3.22