# CVE-2025-21018: Information disclosure in Blockchain Keystore

> Local privileged attackers can read out-of-bounds memory in Samsung Blockchain Keystore, potentially exposing sensitive data.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Aug 2025
- **Updated:** 6 Aug 2025
- **Also known as:** GHSA-8fr5-48m4-ccp8

## What is CVE-2025-21018?

CVE-2025-21018 is a medium-severity vulnerability in Samsung Mobile Blockchain Keystore, published on 6 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Out-of-bounds read in Blockchain Keystore prior to version 1.3.17.2 allows local privileged attackers to read out-of-bounds memory.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2025-21018?

It affects 1 product.


Products: Samsung Blockchain Keystore.

## How do I fix CVE-2025-21018?

No fix has been published for CVE-2025-21018 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-21018 being exploited?

There is no known exploitation of CVE-2025-21018 in the wild and no public exploit code.

## Other vulnerabilities in Samsung Mobile Blockchain Keystore

- [CVE-2024-49406](https://insights.sbomify.com/CVE-2024-49406/): Other in Blockchain Keystore (medium 6.7)
- [CVE-2025-21017](https://insights.sbomify.com/CVE-2025-21017/): Memory corruption in Blockchain Keystore (medium 6.3)
- [CVE-2025-20900](https://insights.sbomify.com/CVE-2025-20900/): Memory corruption in Blockchain Keystore (medium 6.3)
- [CVE-2025-21020](https://insights.sbomify.com/CVE-2025-21020/): Memory corruption in Blockchain Keystore (medium 5.7)
- [CVE-2025-21021](https://insights.sbomify.com/CVE-2025-21021/): Memory corruption in Blockchain Keystore (medium 5.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-21018 and fix it if it is affected.

What it is: CVE-2025-21018 is a medium-severity vulnerability in Samsung Mobile Blockchain Keystore, published on 6 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-21018 in the wild and no public exploit code.

Affected product: Samsung Mobile Blockchain Keystore. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2025-21018/ (Markdown: https://insights.sbomify.com/CVE-2025-21018/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-21018
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-21018
- OSV: https://osv.dev/vulnerability/CVE-2025-21018

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-21018/
Summaries are generated and may contain mistakes; the official description above is the record.