CVE-2025-3677
lm-sys fastchat apply_delta.py apply_delta_low_cpu_mem deserialization
Published Apr 16, 2025
CVSS 4.0 · 4.8 Medium
EPSS < 1%
KEV · Not listed
Description
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.
Affected Products
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CVE record
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NVD configurations
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Red Hat packages
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OpenCVE enrichment
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| lm-sys | fastchat | affected |
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No data available yet.
Remediation
Tracking
Advisories
| Source | ID | Title |
|---|---|---|
 EUVD |
EUVD-2025-11794 | 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. |
Metrics
Attack Vector Local
Attack Complexity Low
Privileges Required Low
Attack Requirements None
User Interaction None
Vulnerable System Confidentiality Impact Low
Vulnerable System Integrity Impact Low
Vulnerable System Availability Impact Low
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
Attack Vector Local
Attack Complexity Low
Privileges Required Low
Scope Unchanged
Confidentiality Impact Low
Integrity Impact Low
Availability Impact Low
User Interaction None
Attack Vector Local
Attack Complexity Low
Privileges Required Low
Scope Unchanged
Confidentiality Impact Low
Integrity Impact Low
Availability Impact Low
User Interaction None
Access Vector Local
Access Complexity Low
Authentication Single
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.210% probability within 30 days)
Exploitation none
Automatable no
Technical Impact partial
References
History
Jul 11, 2025 1:45 PM
Scoring metrics updated
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| Metrics |
epss
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epss
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Apr 16, 2025 8:15 PM
Scoring metrics updated
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ssvc
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Apr 16, 2025 8:45 AM
Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | lm-sys fastchat apply_delta.py apply_delta_low_cpu_mem deserialization | |
| Weaknesses | CWE-20 CWE-502 |
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| References |
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| Metrics |
cvssV2_0
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Subscriptions
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