# CVE-2025-3162: InternLM LMDeploy PT File utils.py load_weight_ckpt deserialization

> Local attackers can execute arbitrary code via unsafe deserialization in LMDeploy's weight loading function.

- **Severity:** Medium 4.8 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Apr 2025
- **Updated:** 21 Apr 2025
- **Also known as:** GHSA-7vc5-mjwp-c8fq, PYSEC-2026-1577

## What is CVE-2025-3162?

CVE-2025-3162 is a medium-severity unsafe deserialization vulnerability in InternLM LMDeploy, published on 3 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability was found in InternLM LMDeploy up to 0.7.1. It has been classified as critical. Affected is the function load_weight_ckpt of the file lmdeploy/lmdeploy/vl/model/utils.py of the component PT File Handler. The manipulation leads to deserialization. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.

Weakness: CWE-502 (Deserialization of Untrusted Data), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2025-3162?

3 open source packages ship an affected version, including lmdeploy. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `lmdeploy` | PyPI | All versions to 0.7.1 | None |
| `lmdeploy` | PyPI | All versions to 0.7.1 | None |
| `lmdeploy` | PyPI | All versions to 0.7.1 | None |

Products: Internlm Lmdeploy.

## How do I fix CVE-2025-3162?

No fix has been published for CVE-2025-3162 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-3162 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3162 exists.

## Other vulnerabilities in InternLM LMDeploy

- [CVE-2025-67729](https://insights.sbomify.com/CVE-2025-67729/): lmdeploy vulnerable to Arbitrary Code Execution via Insecure Deserialization in torch.load() (high 8.8)
- [CVE-2026-63764](https://insights.sbomify.com/CVE-2026-63764/): LMDeploy Server-Side Request Forgery via HTTP Redirect Bypass (high 7.7)
- [CVE-2026-33626](https://insights.sbomify.com/CVE-2026-33626/): LMDeploy Vulnerable to Server-Side Request Forgery (SSRF) via Vision-Language Image Loading (high 7.5)
- [CVE-2025-3163](https://insights.sbomify.com/CVE-2025-3163/): InternLM LMDeploy conf.py open code injection (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-3162 and fix it if it is affected.

What it is: CVE-2025-3162 is a medium-severity unsafe deserialization vulnerability in InternLM LMDeploy, published on 3 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3162 exists.

Affected packages and fixed versions:
- lmdeploy (PyPI): affected all versions up to 0.7.1; no fix listed
- lmdeploy (PyPI): affected all versions up to 0.7.1; no fix listed
- lmdeploy (PyPI): affected all versions up to 0.7.1; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-3162/ (Markdown: https://insights.sbomify.com/CVE-2025-3162/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-3162
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-3162
- OSV: https://osv.dev/vulnerability/CVE-2025-3162

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-3162/
Summaries are generated and may contain mistakes; the official description above is the record.