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6 vulnerabilities by esnet
CVE-2026-101283 (GCVE-0-2026-101283)
Vulnerability from nvd – Published: 2026-09-30 21:32 – Updated: 2026-10-01 15:51
VLAI
EPSS
VEX
Summary
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
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:51 UTC
CWE
- CWE-122 - Heap-based buffer overflow
Assigner
References
1 reference
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CVE-2026-101276 (GCVE-0-2026-101276)
Vulnerability from nvd – Published: 2026-09-30 21:11 – Updated: 2026-10-01 15:51
VLAI
EPSS
VEX
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:50 UTC
CWE
- CWE-416 - Use after free
Assigner
References
1 reference
| URL | Tags |
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| https://newreleases.io/project/github/esnet/iperf… | release-notes |
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CVE-2026-102253 (GCVE-0-2026-102253)
Vulnerability from nvd – Published: 2026-09-29 20:11 – Updated: 2026-10-01 15:19 X_Open Source
VLAI
EPSS
VEX
Title
iperf3 < 3.22 UDP Receive Worker Infinite Loop DoS
Summary
iperf3 versions prior to 3.22 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash-loop the server's UDP receive worker into an unrecoverable infinite loop by sending a single crafted control-channel parameter message followed by one 16-byte UDP datagram. Attackers can permanently pin the affected per-stream receive thread at approximately 100% CPU usage, rendering the server unusable until forcibly killed with SIGKILL, as the process does not respond to normal control-channel closure.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 19:25 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/esnet/iperf/releases/tag/3.22 | vendor-advisorypatch |
| https://github.com/esnet/iperf/blob/master/RELNOTES.md | release-notes |
| https://www.vulncheck.com/advisories/iperf3-udp-r… | third-party-advisory |
Impacted products
Date Public
2026-09-29 00:00
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CVE-2026-101283 (GCVE-0-2026-101283)
Vulnerability from cvelistv5 – Published: 2026-09-30 21:32 – Updated: 2026-10-01 15:51
VLAI
EPSS
VEX
Summary
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
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:51 UTC
CWE
- CWE-122 - Heap-based buffer overflow
Assigner
References
1 reference
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CVE-2026-101276 (GCVE-0-2026-101276)
Vulnerability from cvelistv5 – Published: 2026-09-30 21:11 – Updated: 2026-10-01 15:51
VLAI
EPSS
VEX
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 15:50 UTC
CWE
- CWE-416 - Use after free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://newreleases.io/project/github/esnet/iperf… | release-notes |
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CVE-2026-102253 (GCVE-0-2026-102253)
Vulnerability from cvelistv5 – Published: 2026-09-29 20:11 – Updated: 2026-10-01 15:19 X_Open Source
VLAI
EPSS
VEX
Title
iperf3 < 3.22 UDP Receive Worker Infinite Loop DoS
Summary
iperf3 versions prior to 3.22 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash-loop the server's UDP receive worker into an unrecoverable infinite loop by sending a single crafted control-channel parameter message followed by one 16-byte UDP datagram. Attackers can permanently pin the affected per-stream receive thread at approximately 100% CPU usage, rendering the server unusable until forcibly killed with SIGKILL, as the process does not respond to normal control-channel closure.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 19:25 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/esnet/iperf/releases/tag/3.22 | vendor-advisorypatch |
| https://github.com/esnet/iperf/blob/master/RELNOTES.md | release-notes |
| https://www.vulncheck.com/advisories/iperf3-udp-r… | third-party-advisory |
Impacted products
Date Public
2026-09-29 00:00
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