Samsung Android libimagecodec.quram.so Out-of-Bounds Write Remote Code Execution Vulnerability (CVE-2025-21043) Urgent Security Advisory
Executive & SecOps Summary
SECOPS ASSESSMENTSamsung Android mobile devices and the embedded libimagecodec.quram.so library prior to the SMR Sep-2025 Release 1 security patch
Remote attackers can execute arbitrary code with high privileges without user interaction by tricking the system into processing a specially crafted image file
Immediately apply the Samsung official software update (SMR Sep-2025 Release 1 or later) and restrict automatic downloading of media files from untrusted sources
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Apply the official Samsung system update immediately. For enterprise environments managed via MDM/UEM, enforce the latest security patch level using the following administrative commands or policies.
# Triggering SOTA (Software Over The Air) update service via ADB for testing
adb shell am start -n com.sec.android.soagent/com.sec.android.soagent.SOTAService2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, disable automatic media downloads in all messaging applications (e.g., WhatsApp, Telegram) and restrict access to untrusted websites.
# Example of restricting background data and auto-sync for media providers via ADB
adb shell cmd netpolicy set restrict-background true3. Log Audit & IoC Verification Commands
Inspect the device logs and system files to verify the presence of the vulnerable library and check for any crash indicators related to image decoding.
# Check the file properties of the target library on the device
adb shell ls -l /system/lib*/libimagecodec.quram.so
# Dump system logs to search for segmentation faults or crashes in the image codec library
adb logcat -d | grep -i -E 'quram|imagecodec|fatal signal 11'Block Kernel Privilege Escalation & Ransomware Payloads Before You Can Reboot
Protect unpatched Windows, Linux, and macOS workloads against in-memory exploitation and lateral movement with autonomous EDR.
Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2025-21043) is an Out-of-bounds Write (CWE-787) flaw residing in the 'libimagecodec.quram.so' library, which is responsible for image decoding and processing on Samsung Android devices. The root cause is the lack of proper input validation when parsing image headers or metadata, allowing an attacker to write data past the allocated boundary of the memory buffer.
2. Exploitation Mechanics & Attack Scenario
An attacker can exploit this vulnerability by crafting a malicious image file (such as JPEG or PNG) containing anomalous metadata designed to trigger a buffer overflow. When this image is processed by the vulnerable 'libimagecodec.quram.so' library—either via an automatic preview in a messaging app, a web browser, or the system gallery—the out-of-bounds write occurs. This corrupts adjacent memory structures, enabling the execution of arbitrary shellcode within the context of the media parsing process.
3. Infrastructure & Business Impact
With a CVSS score of 9.8 (Critical) and its inclusion in the CISA Known Exploited Vulnerabilities (KEV) catalog, this vulnerability poses an immediate threat as it is actively being exploited in the wild. Successful exploitation can lead to complete device compromise, unauthorized data exfiltration, and potential lateral movement within corporate networks, severely impacting enterprise mobile security and business continuity.
Official Vendor Advisories & References
Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.
Frequently Asked SecOps Questions (CVE-2025-21043)
FAQQ1. How critical is CVE-2025-21043 and is it actively exploited in the wild?
CVE-2025-21043 is rated CVSS 9.8 (CRITICAL) with a 30-day EPSS exploitation probability of 2.2%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2025-21043?
Primary impacted vendors include samsung across android, libimagecodec.quram.so. Scope summary: Samsung Android devices running software versions prior to the SMR Sep-2025 Release 1 security update
Q3. What temporary mitigations or workarounds exist for CVE-2025-21043 before patching?
[Mitigation] Immediately apply the Samsung official software update (SMR Sep-2025 Release 1 or later) and restrict automatic downloading of media files from untrusted sources Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
Generate an Internal Engineering Notice or CISO Report for CVE-2025-21043
Instantly format this advisory into an executive CISO summary or engineering patch ticket.
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