Search
Find a vulnerability
Search criteria
6 vulnerabilities by esnet
CVE-2026-101283 (GCVE-0-2026-101283)
Vulnerability from nvd – Published: 2026-09-30 21:32 – Updated: 2026-09-30 21:32
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
CWE
- CWE-122 - Heap-based buffer overflow
Assigner
References
1 reference
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "iperf3",
"vendor": "esnet",
"versions": [
{
"status": "affected",
"version": "3.20"
},
{
"status": "affected",
"version": "3.21"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Anthropic"
},
{
"lang": "en",
"type": "analyst",
"value": "Ada Logics"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "iperf3 3.20\u20133.21 (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"
}
],
"value": "iperf3 3.20\u20133.21 (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"
}
],
"impacts": [
{
"capecId": "CAPEC-100",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-100 Overflow Buffers"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 9.2,
"baseSeverity": "CRITICAL",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-122",
"description": "CWE-122 Heap-based buffer overflow",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-30T21:32:14.699Z",
"orgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
"shortName": "Anthropic"
},
"references": [
{
"url": "https://newreleases.io/project/github/esnet/iperf/release/3.22"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
"assignerShortName": "Anthropic",
"cveId": "CVE-2026-101283",
"datePublished": "2026-09-30T21:32:14.699Z",
"dateReserved": "2026-09-28T12:01:09.970Z",
"dateUpdated": "2026-09-30T21:32:14.699Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-101276 (GCVE-0-2026-101276)
Vulnerability from nvd – Published: 2026-09-30 21:11 – Updated: 2026-09-30 21:13
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
CWE
- CWE-416 - Use after free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://newreleases.io/project/github/esnet/iperf… | release-notes |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "iperf3",
"vendor": "esnet",
"versions": [
{
"status": "affected",
"version": "3.21"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Anthropic"
},
{
"lang": "en",
"type": "reporter",
"value": "Ada Logics"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "iperf3 3.21 (esnet/iperf) contains a remote, unauthenticated heap use-after-free: the server\u0027s 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."
}
],
"value": "iperf3 3.21 (esnet/iperf) contains a remote, unauthenticated heap use-after-free: the server\u0027s 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."
}
],
"impacts": [
{
"capecId": "CAPEC-456",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-456 Infected Memory"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 9.2,
"baseSeverity": "CRITICAL",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use after free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-30T21:13:21.540Z",
"orgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
"shortName": "Anthropic"
},
"references": [
{
"tags": [
"release-notes"
],
"url": "https://newreleases.io/project/github/esnet/iperf/release/3.22"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
"assignerShortName": "Anthropic",
"cveId": "CVE-2026-101276",
"datePublished": "2026-09-30T21:11:52.046Z",
"dateReserved": "2026-09-28T11:52:18.066Z",
"dateUpdated": "2026-09-30T21:13:21.540Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-102253 (GCVE-0-2026-102253)
Vulnerability from nvd – Published: 2026-09-29 20:11 – Updated: 2026-09-30 19:25 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 |
Date Public
2026-09-29 00:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-102253",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-30T19:25:42.477583Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-30T19:25:56.306Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:github/esnet/iperf",
"product": "iperf3",
"repo": "https://github.com/esnet/iperf",
"vendor": "esnet",
"versions": [
{
"lessThan": "3.22",
"status": "affected",
"version": "3.14",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Ravindu Lakmina Munaweera"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulnCheck"
}
],
"datePublic": "2026-09-29T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "iperf3 versions prior to 3.22 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash-loop the server\u0027s 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."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-835",
"description": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-29T20:11:47.089Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "Vendor Patch",
"tags": [
"vendor-advisory",
"patch"
],
"url": "https://github.com/esnet/iperf/releases/tag/3.22"
},
{
"name": "Vendor Release Notes",
"tags": [
"release-notes"
],
"url": "https://github.com/esnet/iperf/blob/master/RELNOTES.md"
},
{
"name": "VulnCheck Advisory",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/iperf3-udp-receive-worker-infinite-loop-dos"
}
],
"source": {
"discovery": "UNKNOWN"
},
"tags": [
"x_open-source"
],
"title": "iperf3 \u003c 3.22 UDP Receive Worker Infinite Loop DoS",
"x_generator": {
"engine": "vulncheck"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-102253",
"datePublished": "2026-09-29T20:11:47.089Z",
"dateReserved": "2026-09-28T19:17:36.656Z",
"dateUpdated": "2026-09-30T19:25:56.306Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-101283 (GCVE-0-2026-101283)
Vulnerability from cvelistv5 – Published: 2026-09-30 21:32 – Updated: 2026-09-30 21:32
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
CWE
- CWE-122 - Heap-based buffer overflow
Assigner
References
1 reference
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "iperf3",
"vendor": "esnet",
"versions": [
{
"status": "affected",
"version": "3.20"
},
{
"status": "affected",
"version": "3.21"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Anthropic"
},
{
"lang": "en",
"type": "analyst",
"value": "Ada Logics"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "iperf3 3.20\u20133.21 (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"
}
],
"value": "iperf3 3.20\u20133.21 (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"
}
],
"impacts": [
{
"capecId": "CAPEC-100",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-100 Overflow Buffers"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 9.2,
"baseSeverity": "CRITICAL",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-122",
"description": "CWE-122 Heap-based buffer overflow",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-30T21:32:14.699Z",
"orgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
"shortName": "Anthropic"
},
"references": [
{
"url": "https://newreleases.io/project/github/esnet/iperf/release/3.22"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
"assignerShortName": "Anthropic",
"cveId": "CVE-2026-101283",
"datePublished": "2026-09-30T21:32:14.699Z",
"dateReserved": "2026-09-28T12:01:09.970Z",
"dateUpdated": "2026-09-30T21:32:14.699Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-101276 (GCVE-0-2026-101276)
Vulnerability from cvelistv5 – Published: 2026-09-30 21:11 – Updated: 2026-09-30 21:13
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
CWE
- CWE-416 - Use after free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://newreleases.io/project/github/esnet/iperf… | release-notes |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "iperf3",
"vendor": "esnet",
"versions": [
{
"status": "affected",
"version": "3.21"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Anthropic"
},
{
"lang": "en",
"type": "reporter",
"value": "Ada Logics"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "iperf3 3.21 (esnet/iperf) contains a remote, unauthenticated heap use-after-free: the server\u0027s 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."
}
],
"value": "iperf3 3.21 (esnet/iperf) contains a remote, unauthenticated heap use-after-free: the server\u0027s 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."
}
],
"impacts": [
{
"capecId": "CAPEC-456",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-456 Infected Memory"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 9.2,
"baseSeverity": "CRITICAL",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use after free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-30T21:13:21.540Z",
"orgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
"shortName": "Anthropic"
},
"references": [
{
"tags": [
"release-notes"
],
"url": "https://newreleases.io/project/github/esnet/iperf/release/3.22"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 1.0.5"
}
}
},
"cveMetadata": {
"assignerOrgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
"assignerShortName": "Anthropic",
"cveId": "CVE-2026-101276",
"datePublished": "2026-09-30T21:11:52.046Z",
"dateReserved": "2026-09-28T11:52:18.066Z",
"dateUpdated": "2026-09-30T21:13:21.540Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-102253 (GCVE-0-2026-102253)
Vulnerability from cvelistv5 – Published: 2026-09-29 20:11 – Updated: 2026-09-30 19:25 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 |
Date Public
2026-09-29 00:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-102253",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-30T19:25:42.477583Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-30T19:25:56.306Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:github/esnet/iperf",
"product": "iperf3",
"repo": "https://github.com/esnet/iperf",
"vendor": "esnet",
"versions": [
{
"lessThan": "3.22",
"status": "affected",
"version": "3.14",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Ravindu Lakmina Munaweera"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulnCheck"
}
],
"datePublic": "2026-09-29T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "iperf3 versions prior to 3.22 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash-loop the server\u0027s 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."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-835",
"description": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-29T20:11:47.089Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "Vendor Patch",
"tags": [
"vendor-advisory",
"patch"
],
"url": "https://github.com/esnet/iperf/releases/tag/3.22"
},
{
"name": "Vendor Release Notes",
"tags": [
"release-notes"
],
"url": "https://github.com/esnet/iperf/blob/master/RELNOTES.md"
},
{
"name": "VulnCheck Advisory",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/iperf3-udp-receive-worker-infinite-loop-dos"
}
],
"source": {
"discovery": "UNKNOWN"
},
"tags": [
"x_open-source"
],
"title": "iperf3 \u003c 3.22 UDP Receive Worker Infinite Loop DoS",
"x_generator": {
"engine": "vulncheck"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-102253",
"datePublished": "2026-09-29T20:11:47.089Z",
"dateReserved": "2026-09-28T19:17:36.656Z",
"dateUpdated": "2026-09-30T19:25:56.306Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}