Samsung Mobile Devices Out-of-Bounds Write Vulnerability (CVE-2025-21043)

Samsung mobile devices contain an out-of-bounds write vulnerability in libimagecodec.quram.so which allows remote attackers to execute arbitrary code.

Published Sep 12, 2025 · Updated May 17, 2026

Why patchRisk explained in plain English

Worst-case scenarioIf unpatched

A remote attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2025-10-23 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Out-of-bounds Write (CWE-787) vulnerability in Samsung Mobile Devices. Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code. Exploitation requires remote network access, low attack complexity, no authentication required, and user interaction required.

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Phishing link

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Malicious file

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Server compromised

Am I affected?Quick check

Probably yes if any of these apply:

●IT Security

●Running android: 13.0, 14.0, 15.0, 16.0

Real-world incidentsWhat we've seen

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2025-10-02 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2025-10-23.

How to patch

Manual remediation steps

Identify affected hosts: query inventory for general installs in scope.

Apply the vendor security update referenced in CVE-2025-21043's advisory. No specific KB/version is encoded yet — consult the linked MSRC/vendor URL.

Verify the fix per the vendor's published verification steps.

Document the remediation in your change ticket and re-scan with your vulnerability scanner to confirm closure.

PowerShell automationComing soon

No tested PowerShell script for this entry yet. We’re prioritising automation based on user demand.

References

↗ CVE-2025-21043 ↗ MSRC Advisory ↗ NVD ↗ Vendor Advisory