Critical severityNVD Advisory· Published Sep 30, 2026

CVE-2026-101276

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.

Affected products

Esnet/iperfllm-fuzzy
Range: <=3.21

Patches

Vulnerability mechanics

References

newreleases.io/project/github/esnet/iperf/release/3.22nvd

News mentions

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cvss	0.585
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000