FKIE_CVE-2025-3677
Vulnerability from fkie_nvd - Published: 2025-04-16 09:15 - Updated: 2026-06-17 09:20
Severity
Summary
A vulnerability classified as critical was found in lm-sys fastchat up to 0.2.36. This vulnerability affects the function split_files/apply_delta_low_cpu_mem of the file fastchat/model/apply_delta.py. The manipulation leads to deserialization. An attack has to be approached locally.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"product": "fastchat",
"vendor": "lm-sys",
"versions": [
{
"status": "affected",
"version": "0.2.0"
},
{
"status": "affected",
"version": "0.2.1"
},
{
"status": "affected",
"version": "0.2.2"
},
{
"status": "affected",
"version": "0.2.3"
},
{
"status": "affected",
"version": "0.2.4"
},
{
"status": "affected",
"version": "0.2.5"
},
{
"status": "affected",
"version": "0.2.6"
},
{
"status": "affected",
"version": "0.2.7"
},
{
"status": "affected",
"version": "0.2.8"
},
{
"status": "affected",
"version": "0.2.9"
},
{
"status": "affected",
"version": "0.2.10"
},
{
"status": "affected",
"version": "0.2.11"
},
{
"status": "affected",
"version": "0.2.12"
},
{
"status": "affected",
"version": "0.2.13"
},
{
"status": "affected",
"version": "0.2.14"
},
{
"status": "affected",
"version": "0.2.15"
},
{
"status": "affected",
"version": "0.2.16"
},
{
"status": "affected",
"version": "0.2.17"
},
{
"status": "affected",
"version": "0.2.18"
},
{
"status": "affected",
"version": "0.2.19"
},
{
"status": "affected",
"version": "0.2.20"
},
{
"status": "affected",
"version": "0.2.21"
},
{
"status": "affected",
"version": "0.2.22"
},
{
"status": "affected",
"version": "0.2.23"
},
{
"status": "affected",
"version": "0.2.24"
},
{
"status": "affected",
"version": "0.2.25"
},
{
"status": "affected",
"version": "0.2.26"
},
{
"status": "affected",
"version": "0.2.27"
},
{
"status": "affected",
"version": "0.2.28"
},
{
"status": "affected",
"version": "0.2.29"
},
{
"status": "affected",
"version": "0.2.30"
},
{
"status": "affected",
"version": "0.2.31"
},
{
"status": "affected",
"version": "0.2.32"
},
{
"status": "affected",
"version": "0.2.33"
},
{
"status": "affected",
"version": "0.2.34"
},
{
"status": "affected",
"version": "0.2.35"
},
{
"status": "affected",
"version": "0.2.36"
}
]
}
],
"source": "cna@vuldb.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability classified as critical was found in lm-sys fastchat up to 0.2.36. This vulnerability affects the function split_files/apply_delta_low_cpu_mem of the file fastchat/model/apply_delta.py. The manipulation leads to deserialization. An attack has to be approached locally."
},
{
"lang": "es",
"value": "Se detect\u00f3 una vulnerabilidad cr\u00edtica en lm-sys fastchat hasta la versi\u00f3n 0.2.36. Esta vulnerabilidad afecta la funci\u00f3n split_files/apply_delta_low_cpu_mem del archivo fastchat/model/apply_delta.py. La manipulaci\u00f3n provoca la deserializaci\u00f3n. El ataque debe abordarse localmente."
}
],
"id": "CVE-2025-3677",
"lastModified": "2026-06-17T09:20:27.800",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "LOCAL",
"authentication": "SINGLE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.3,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:L/AC:L/Au:S/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 3.1,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "cna@vuldb.com",
"type": "Secondary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.4,
"source": "cna@vuldb.com",
"type": "Secondary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"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": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/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": "LOW",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "cna@vuldb.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-3677",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-04-16T19:30:12.404331Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-04-16T09:15:28.273",
"references": [
{
"source": "cna@vuldb.com",
"url": "https://github.com/lm-sys/FastChat/issues/3713"
},
{
"source": "cna@vuldb.com",
"url": "https://vuldb.com/?ctiid.304966"
},
{
"source": "cna@vuldb.com",
"url": "https://vuldb.com/?id.304966"
},
{
"source": "cna@vuldb.com",
"url": "https://vuldb.com/?submit.552755"
}
],
"sourceIdentifier": "cna@vuldb.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-20"
},
{
"lang": "en",
"value": "CWE-502"
}
],
"source": "cna@vuldb.com",
"type": "Secondary"
}
]
}
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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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