# CVE-2025-21042: Samsung Mobile Devices Out-of-Bounds Write

> Remote attackers can execute arbitrary code via an out-of-bounds write in the image codec library on Samsung mobile devices.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 10 Nov 2025 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Sep 2025
- **Updated:** 7 Oct 2026
- **Also known as:** GHSA-jh44-w65q-8p7f

## What is CVE-2025-21042?

CVE-2025-21042 is a high-severity memory corruption vulnerability in Samsung Android, published on 12 Sep 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Out-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2025-21042?

It affects 1 product.


Products: Samsung Android.

## How do I fix CVE-2025-21042?

No fix has been published for CVE-2025-21042 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 1 Dec 2025.

## Is CVE-2025-21042 being exploited?

Yes. Attackers have exploited CVE-2025-21042 in the wild since at least 10 Nov 2025.

Public exploit code:

- CVE-2025-21042 (github_poc): https://github.com/patricnilackshan/Samsung-CVE-2025-21042

## Other vulnerabilities in Samsung Android

- [CVE-2025-21043](https://insights.sbomify.com/CVE-2025-21043/): Samsung Mobile Devices Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2021-25487](https://insights.sbomify.com/CVE-2021-25487/): Samsung Mobile Devices Out-of-Bounds Read (high 7.3, exploited in the wild)
- [CVE-2021-25394](https://insights.sbomify.com/CVE-2021-25394/): Samsung Mobile Devices Race Condition (medium 6.4, exploited in the wild)
- [CVE-2021-25395](https://insights.sbomify.com/CVE-2021-25395/): Samsung Mobile Devices Race Condition (medium 6.4, exploited in the wild)
- [CVE-2021-25369](https://insights.sbomify.com/CVE-2021-25369/): Samsung Mobile Devices Improper Access Control (medium 6.2, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-21042 and fix it if it is affected.

What it is: CVE-2025-21042 is a high-severity memory corruption vulnerability in Samsung Android, published on 12 Sep 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: Yes. Attackers have exploited CVE-2025-21042 in the wild since at least 10 Nov 2025.

Affected product: Samsung Android. 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-2025-21042/ (Markdown: https://insights.sbomify.com/CVE-2025-21042/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-21042
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-21042
- OSV: https://osv.dev/vulnerability/CVE-2025-21042

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-21042/
Summaries are generated and may contain mistakes; the official description above is the record.