Description
iperf3 3.21 (esnet/iperf) contains a remote, unauthenticated heap use-after-free: the server's per-test watchdog server_timer_proc() frees streams without cancelling/joining their worker threads, so a blocked worker dereferences a freed iperf_stream; fixed in 3.22.
Published: 2026-09-30
Score: 9.2 Critical
EPSS: n/a
KEV: No
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 21:15:00 +0000

Type Values Removed Values Added
Description iperf3 3.21 (esnet/iperf) contains a remote, unauthenticated heap use-after-free: the server's per-test watchdog server_timer_proc() frees streams without cancelling/joining their worker threads, so a blocked worker dereferences a freed iperf_stream; fixed in 3.22.
Weaknesses CWE-416
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: 2026-09-30T21:13:21.540Z

Reserved: 2026-09-28T11:52:18.066Z

Link: CVE-2026-101276

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-30T21:16:54.913

Modified: 2026-09-30T21:16:54.913

Link: CVE-2026-101276

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses