CVE-2026-94043 (GCVE-0-2026-94043)
Vulnerability from cvelistv5 – Published: 2026-09-20 18:00 – Updated: 2026-09-20 18:00 X_Open Source
VLAI
EPSS
VEX
Title
Free5GC Gmm handler.go race condition
Summary
A vulnerability was determined in Free5GC up to 4.2.3. This vulnerability affects unknown code of the file /corefuzzer_deps/free5gc/NFs/amf/internal/gmm/handler.go of the component Gmm Handler. This manipulation causes race condition. The attack can be initiated remotely. Patch name: e323b01464355781b8b8d5dd695e05cbc00a62f2. To fix this issue, it is recommended to deploy a patch.
Severity
CWE
- CWE-362 - Race Condition
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/407972 | vdb-entry |
| https://vuldb.com/vuln/407972/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-94043 | third-party-advisory |
| https://vuldb.com/submit/949261 | third-party-advisory |
| https://github.com/free5gc/free5gc/issues/1109 | issue-tracking |
| https://github.com/free5gc/amf/pull/238 | issue-trackingpatch |
| https://github.com/free5gc/amf/commit/e323b014643… | patch |
| https://github.com/free5gc/free5gc/ | product |
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*"
],
"modules": [
"Gmm Handler"
],
"product": "Free5GC",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "4.2.0"
},
{
"status": "affected",
"version": "4.2.1"
},
{
"status": "affected",
"version": "4.2.2"
},
{
"status": "affected",
"version": "4.2.3"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "JinboXu (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was determined in Free5GC up to 4.2.3. This vulnerability affects unknown code of the file /corefuzzer_deps/free5gc/NFs/amf/internal/gmm/handler.go of the component Gmm Handler. This manipulation causes race condition. The attack can be initiated remotely. Patch name: e323b01464355781b8b8d5dd695e05cbc00a62f2. To fix this issue, it is recommended to deploy a patch."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C",
"version": "3.1"
}
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"version": "3.0"
}
},
{
"cvssV2_0": {
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"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-362",
"description": "Race Condition",
"lang": "en",
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}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-20T18:00:10.299Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-407972 | Free5GC Gmm handler.go race condition",
"tags": [
"vdb-entry"
],
"url": "https://vuldb.com/vuln/407972"
},
{
"name": "VDB-407972 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/407972/cti"
},
{
"name": "CVE-2026-94043 | CVE Analysis and Report",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/cve/CVE-2026-94043"
},
{
"name": "Submit #949261 | N/A Free5GC \u003c=4.2.3 Race Condition",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/949261"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/free5gc/free5gc/issues/1109"
},
{
"tags": [
"issue-tracking",
"patch"
],
"url": "https://github.com/free5gc/amf/pull/238"
},
{
"tags": [
"patch"
],
"url": "https://github.com/free5gc/amf/commit/e323b01464355781b8b8d5dd695e05cbc00a62f2"
},
{
"tags": [
"product"
],
"url": "https://github.com/free5gc/free5gc/"
}
],
"tags": [
"x_open-source"
],
"timeline": [
{
"lang": "en",
"time": "2026-09-19T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-09-19T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-09-19T23:25:35.000Z",
"value": "VulDB entry last update"
}
],
"title": "Free5GC Gmm handler.go race condition",
"x_generator": [
"VulDB PVTS v202609"
]
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-94043",
"datePublished": "2026-09-20T18:00:10.299Z",
"dateReserved": "2026-09-19T21:20:27.268Z",
"dateUpdated": "2026-09-20T18:00:10.299Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-94043",
"date": "2026-09-21",
"epss": "0.00342",
"percentile": "0.27684"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"cpes": [
"cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*"
],
"modules": [
"Gmm Handler"
],
"product": "Free5GC",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "4.2.0"
},
{
"status": "affected",
"version": "4.2.1"
},
{
"status": "affected",
"version": "4.2.2"
},
{
"status": "affected",
"version": "4.2.3"
}
]
}
],
"source": "cna@vuldb.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was determined in Free5GC up to 4.2.3. This vulnerability affects unknown code of the file /corefuzzer_deps/free5gc/NFs/amf/internal/gmm/handler.go of the component Gmm Handler. This manipulation causes race condition. The attack can be initiated remotely. Patch name: e323b01464355781b8b8d5dd695e05cbc00a62f2. To fix this issue, it is recommended to deploy a patch."
}
],
"id": "CVE-2026-94043",
"lastModified": "2026-09-21T13:33:33.387",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "cna@vuldb.com",
"type": "Secondary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"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:L",
"version": "3.1"
},
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"impactScore": 1.4,
"source": "cna@vuldb.com",
"type": "Primary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "PROOF_OF_CONCEPT",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "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:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "cna@vuldb.com",
"type": "Secondary"
}
]
},
"published": "2026-09-20T19:17:12.780",
"references": [
{
"source": "cna@vuldb.com",
"url": "https://github.com/free5gc/amf/commit/e323b01464355781b8b8d5dd695e05cbc00a62f2"
},
{
"source": "cna@vuldb.com",
"url": "https://github.com/free5gc/amf/pull/238"
},
{
"source": "cna@vuldb.com",
"url": "https://github.com/free5gc/free5gc/"
},
{
"source": "cna@vuldb.com",
"url": "https://github.com/free5gc/free5gc/issues/1109"
},
{
"source": "cna@vuldb.com",
"url": "https://vuldb.com/cve/CVE-2026-94043"
},
{
"source": "cna@vuldb.com",
"url": "https://vuldb.com/submit/949261"
},
{
"source": "cna@vuldb.com",
"url": "https://vuldb.com/vuln/407972"
},
{
"source": "cna@vuldb.com",
"url": "https://vuldb.com/vuln/407972/cti"
}
],
"sourceIdentifier": "cna@vuldb.com",
"vulnStatus": "Deferred",
"weaknesses": [
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"description": [
{
"lang": "en",
"value": "CWE-362"
}
],
"source": "cna@vuldb.com",
"type": "Primary"
}
]
}
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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