Attack Chain

1. An attacker gains initial access to a device containing a vulnerable Qualcomm DSP.
2. The attacker triggers a process creation event on the DSP. This could involve sending a specifically crafted request to the DSP or exploiting another vulnerability to initiate the process creation.
3. During the process creation, a memory allocation failure occurs within the DSP kernel.
4. This allocation failure leads to memory corruption, where data is written to an incorrect memory location.
5. The attacker leverages the memory corruption to overwrite critical kernel data structures or code.
6. The attacker injects malicious code into the corrupted memory region.
7. The DSP executes the injected malicious code, granting the attacker control over the DSP.
8. The attacker can then use the compromised DSP to further compromise the device or network it is connected to.

Impact

Successful exploitation of CVE-2025-47407 allows an attacker to execute arbitrary code on the DSP with elevated privileges. This can lead to a complete compromise of the affected device, allowing the attacker to steal sensitive data, install malware, or use the device as a launchpad for further attacks. The vulnerability can potentially impact a wide range of devices that utilize Qualcomm DSPs.

Recommendation

• Monitor process creation events for anomalies that may indicate a memory allocation failure, using the process_creation log category and filtering for processes related to the digital signal processor.
• Apply the security patch released by Qualcomm, as referenced in the advisory URL (https://docs.qualcomm.com/product/publicresources/securitybulletin/may-2026-bulletin.html), to address the memory corruption vulnerability.
• Deploy the Sigma rule provided below to detect potential exploitation attempts by monitoring for specific events related to process creation and memory allocation.