Vulnerability DatabaseCVE-2026-101276
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CVE-2026-101276
Published:September 30, 2026
Updated:October 15, 2026
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 Packages
https://github.com/esnet/iperf.git (GITHUB):
Affected version(s) >=3.16 <3.22
Fix Suggestion:
Update to version 3.22
Related Resources (1)
https://newreleases.io/project/github/esnet/iperf/release/3.22
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CVSS v4
Base Score:
9.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Use After Free
CWE-416
EPSS
Base Score:
0.40