CVE-2025-21042 — AI Deep Analysis Summary

Q: Root Cause? (CWE/Flaw)

🔍 **Root Cause**: Out-of-bounds write (OOB Write) flaw. 📉 **CWE**: Not explicitly mapped in data, but technically an OOB Write vulnerability in the image codec library.

Q: Who is affected? (Versions/Components)

📱 **Affected**: Samsung Mobile Devices (Galaxy Android devices). 📦 **Component**: `libimagecodec.quram.so` (Samsung Image Codec). 📅 **Versions**: Prior to SMR Apr-2025 Release 1.

Q: Is there a public Exp? (PoC/Wild Exploitation)

🔓 **Public Exp**: Yes. 📂 **PoCs Available**: Multiple GitHub repositories exist (e.g., `B1ack4sh/Blackash-CVE-2025-21042`). 🌍 **Wild Exploitation**: Risk is high due to low complexity and remote nature.

Q: Is it fixed officially? (Patch/Mitigation)

✅ **Fixed**: Yes. 🩹 **Patch**: Samsung Security Update (SMR) for **Apr-2025 Release 1** or later. 🔗 **Ref**: [Samsung Security Update](https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=04)

Updated May 06, 2026 CVSS 8.8 · High

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Critical Remote Code Execution (RCE) in Samsung's image processing library (`libimagecodec.quram.so`).
💥 **Consequences**: Out-of-bounds write allows attackers to execute arbitrary code remotely via malici…

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Q2Root Cause? (CWE/Flaw)

🔍 **Root Cause**: Out-of-bounds write (OOB Write) flaw.
📉 **CWE**: Not explicitly mapped in data, but technically an OOB Write vulnerability in the image codec library.

Q3Who is affected? (Versions/Components)

📱 **Affected**: Samsung Mobile Devices (Galaxy Android devices).
📦 **Component**: `libimagecodec.quram.so` (Samsung Image Codec).
📅 **Versions**: Prior to SMR Apr-2025 Release 1.

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: Execute arbitrary code remotely.
🔓 **Privileges**: High impact (CVSS: H/C/I/H/A).…

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Q5Is exploitation threshold high? (Auth/Config)

⚖️ **Threshold**: Low.
🔑 **Auth**: None required (PR:N).
🖱️ **User Interaction**: Required (UI:R) — victim must open/view the malicious image.
🌐 **Network**: Remote (AV:N).
⚡ **Complexity**: Low (AC:L).…

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Q6Is there a public Exp? (PoC/Wild Exploitation)

🔓 **Public Exp**: Yes.
📂 **PoCs Available**: Multiple GitHub repositories exist (e.g., `B1ack4sh/Blackash-CVE-2025-21042`).
🌍 **Wild Exploitation**: Risk is high due to low complexity and remote nature.

Q7How to self-check? (Features/Scanning)

🔎 **Self-Check**: Scan for presence of `libimagecodec.quram.so` on Android devices.
📋 **Indicator**: Check if device SMR patch level is **before** Apr-2025 Release 1.
🛠️ **Tools**: Use mobile security scanners or check s…

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Q8Is it fixed officially? (Patch/Mitigation)

✅ **Fixed**: Yes.
🩹 **Patch**: Samsung Security Update (SMR) for **Apr-2025 Release 1** or later.
🔗 **Ref**: [Samsung Security Update](https://security.samsungmobile.com/securityUpdate.smsb?year=2025&month=04)

Q9What if no patch? (Workaround)

🛡️ **No Patch Workaround**:
🚫 **Avoid** opening unknown/untrusted image files (especially DNG).
📵 **Disable** auto-preview of images from untrusted sources.
🔄 **Update** OS immediately if patch is available.
…

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Q10Is it urgent? (Priority Suggestion)

🔥 **Priority**: **CRITICAL**.
⏳ **Urgency**: Immediate action required.
📢 **Reason**: Remote code execution with low exploitation complexity. High impact on confidentiality, integrity, and availability.…

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