Attack Chain

1. Attacker crafts input to trigger attestation report generation.
2. The system initiates an attestation report generation process.
3. An integer overflow occurs during the buffer size calculation for the report.
4. A buffer is allocated based on the incorrect, smaller size resulting from the overflow.
5. Data is copied into the undersized buffer during the attestation report creation.
6. The buffer copy operation overwrites memory beyond the allocated buffer’s boundaries.
7. Corrupted memory leads to a crash or potentially allows for arbitrary code execution.
8. Attacker gains control of the system or causes a denial-of-service.

Impact

Successful exploitation of CVE-2025-47389 can lead to memory corruption, potentially enabling arbitrary code execution. This can result in a complete compromise of the affected system, data breaches, or a denial-of-service condition. While the specific number of affected devices is unknown, the vulnerability impacts any device using the affected Qualcomm component for attestation. Exploitation is local, requiring privileged access, but the impact is critical due to potential code execution.

Recommendation

• Monitor process memory for write operations exceeding allocated buffer sizes, specifically around attestation report generation (see Sigma rule “Detect Memory Corruption via Buffer Overflow”).
• Investigate any crashes or unexpected behavior associated with attestation services, as these could be indicators of exploitation attempts.
• Apply patches or updates provided by Qualcomm to address CVE-2025-47389 as soon as they become available (reference: https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2026-bulletin.html).
• Monitor for any anomalous behavior originating from processes involved in attestation report generation (see Sigma rule “Detect Anomalous Attestation Process”).
• Review and harden access controls to limit the potential impact of local exploitation.