Samsung Mobile Devices: Out-of-Bounds Write in libimagecodec.quram.so

Historical catalog analysis: CISA added this entry on November 10, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2025-21042 is an out-of-bounds write vulnerability (CWE-787) identified in Samsung mobile devices. The flaw resides specifically within the libimagecodec.quram.so library. According to reported data, this vulnerability could be leveraged by a remote attacker to execute arbitrary code on the affected device.

Exposure and applicability

This vulnerability applies to Samsung mobile devices utilizing the affected libimagecodec.quram.so component. Because the flaw is located in an image codec library, exposure typically occurs when the system processes specially crafted image files. Organizations managing large fleets of Samsung mobile hardware—particularly those used for corporate data access or sensitive communications—are at risk if these devices remain unpatched.

Remediation priorities

Our analysis suggests that vulnerability management teams should prioritize remediation based on the potential for remote code execution. The following actions are recommended:

1. Inventory and Identification: Identify all Samsung mobile assets within the environment to determine which devices are running versions of the libimagecodec.quram.so library susceptible to this flaw.
2. Vendor Update Deployment: Apply the security updates provided by Samsung. The source indicates that mitigations should be applied per vendor instructions.
3. Asset Decommissioning: In scenarios where a vendor-supplied mitigation is unavailable for a specific legacy device, our analysis suggests discontinuing use of the product to eliminate the exposure path.

How to validate remediation

Verification must move beyond simple version checks, as a version number does not always guarantee that the specific vulnerable library was successfully updated and loaded into memory.

Defenders should verify remediation by:
* Library Hash Verification: Where possible, confirming the cryptographic hash of libimagecodec.quram.so against the known-secure version provided in the vendor’s update.
* Update Confirmation: Validating through mobile device management (MDM) tools that the specific security patch level associated with this fix has been successfully applied across the fleet.

Limits and open questions

While the vulnerability is documented, several unknowns remain. The source does not specify which exact model numbers or Android OS versions are affected, nor does it provide details on the specific image formats that trigger the out-of-bounds write. Additionally, while CISA has added this to its known exploited vulnerabilities catalog, the status of use in ransomware campaigns is listed as unknown. Residual risk remains for devices that cannot be updated due to end-of-life (EOL) status or delayed carrier updates.

Source and editorial note

CVE-2025-21042: Samsung Mobile Devices Out-of-Bounds Write Vulnerability · Source date: November 10, 2025 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: November 13, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 29, 2026 at 00:30 UTC.

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