CVE-2025-3677

lm-sys fastchat apply_delta.py apply_delta_low_cpu_mem deserialization

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.

Category

4.8
CVSS
Severity: Medium
CVSS 4.0 •
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.02%
Third-Party Advisory vuldb.com
Affected: lm-sys fastchat
Published at:
Updated at:

References

Link Tags
https://vuldb.com/?id.304966 vdb entry technical description
https://vuldb.com/?ctiid.304966 signature permissions required
https://vuldb.com/?submit.552755 third party advisory
https://github.com/lm-sys/FastChat/issues/3713 issue tracking

Frequently Asked Questions

What is the severity of CVE-2025-3677?
CVE-2025-3677 has been scored as a medium severity vulnerability.
How to fix CVE-2025-3677?
To fix CVE-2025-3677, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-3677 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-3677 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-3677?
CVE-2025-3677 affects lm-sys fastchat.
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