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
Published: 2026-09-30
Score: 9.2 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 30 Sep 2026 23:15:00 +0000

Type Values Removed Values Added
Title Pre-Authentication Heap Buffer Overflow in iperf3 RSA Decryption

Wed, 30 Sep 2026 21:45:00 +0000

Type Values Removed Values Added
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
Weaknesses CWE-122
References
Metrics cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: Anthropic

Published:

Updated: 2026-09-30T21:32:14.699Z

Reserved: 2026-09-28T12:01:09.970Z

Link: CVE-2026-101283

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-30T22:16:33.317

Modified: 2026-10-01T02:17:43.350

Link: CVE-2026-101283

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T23:00:17Z

Weaknesses
  • CWE-122

    Heap-based Buffer Overflow