CVE-2025-59614: Qualcomm Memory Corruption in RNG Command Handling

Technical summary

CVE-2025-59614 is a buffer overflow vulnerability (CWE-787) affecting Qualcomm firmware and SoC components across connectivity and audio chipsets. The flaw occurs when a random number generator command is issued with an output buffer smaller than the data the command attempts to write. This out-of-bounds write can overwrite adjacent memory, leading to information disclosure, code execution, or denial of service. The CVSS 3.1 score of 6.7 (Medium) reflects the requirement for high privileges and local attack surface, balanced against high impact on confidentiality, integrity, and availability.

Business impact

Organizations deploying Qualcomm-based wireless connectivity modules (FastConnect, WiFi SoC) or audio codecs (WCD series, WSA speakers) in enterprise or IoT environments face a localized privilege escalation risk. While remote exploitation is not possible, a compromised local process or privileged user could leverage this flaw to breach security boundaries, exfiltrate sensitive data from device memory, or destabilize critical infrastructure endpoints. The breadth of affected product lines suggests wide exposure in smartphone basebands, automotive connectivity stacks, and edge networking appliances.

Affected systems

The vulnerability spans 40 Qualcomm product variants, encompassing firmware and hardware components: WiFi SoCs (Cologne, FastConnect 6900/7800), Bluetooth/WiFi combo chips (QCA0000, SC8380XP), audio codecs (WCD9378C, WCD9380, WCD9385), speaker drivers (WSA8840, WSA8845, WSA8845H), and various internal reference designs (IQX, X-series, XG-series). Both standalone components and their corresponding firmware images are listed, indicating the flaw may reside in ROM, bootloader, or updateable firmware depending on the product.

Exploitability

Exploitation requires high-level local system access (kernel-mode, system administrator, or equivalent privilege level). The attack is deterministic—an attacker with adequate privileges can reliably trigger memory corruption by crafting a malformed RNG command with an insufficient buffer. No user interaction is required. The vulnerability does not appear in active public exploits (KEV status: false) as of the publication date, but the straightforward nature of the flaw means weaponization is feasible once privileged access is obtained. Remote exploitation is not possible without prior code execution or privilege escalation from another vulnerability.

Remediation

Patch availability should be verified through Qualcomm security advisories for each affected product line. Firmware updates for connectivity and audio components should be prioritized. For devices that cannot be immediately patched, restrict administrator and system-level access through role-based access control, disable unnecessary RNG-consuming services if feasible, and monitor for suspicious system calls issuing RNG commands with unusual parameters. In high-risk environments, consider isolating or segmenting devices pending patches.

Patch guidance

Consult Qualcomm's official security bulletins for CVE-2025-59614 to identify firmware version fixes for your specific component (Cologne, FastConnect, QCA, WCD, WSA, or reference design SoC). Patches typically address the buffer validation logic to ensure output buffer sizes are checked before RNG operations. Apply updates in a staged manner in test environments first, as firmware updates can affect wireless, audio, or system stability. Verify firmware integrity and authenticity post-deployment. For integrated SoCs, check with your device OEM or module supplier for availability and compatibility notes.

Detection guidance

Monitor kernel logs and system call traces for RNG command invocations with mismatched buffer parameters or repeated allocation failures. Advanced endpoint detection can flag processes executing at high privilege attempting memory operations on firmware or kernel regions. Device firmware update logs should be audited to confirm patches are applied. In 802.11 or Bluetooth stacks, inspect for firmware crash dumps or watchdog resets correlating with RNG command sequences, which may indicate exploitation attempts. Look for anomalous memory read/write patterns in device kernel debuggers if available.

Why prioritize this

This vulnerability merits prioritization in environments where device firmware updates are deployable within your patch cycle and where local administrative access is a plausible threat model (e.g., insider risk, supply-chain compromise, jailbroken devices). For standard enterprise deployments with strong privilege boundary enforcement, risk is lower; however, organizations managing Qualcomm-based IoT, automotive, or network appliances should treat this as a high-priority firmware remediation target. The broad product surface and memory corruption nature elevate risk beyond cosmetic bugs.

Risk score, explained

The CVSS 3.1 score of 6.7 reflects: (1) Local attack vector only—no remote exploitation pathway; (2) High privilege requirement—reduces opportunistic attack likelihood; (3) High impact across confidentiality, integrity, and availability—memory corruption can leak secrets, modify behavior, or crash the system; (4) Low complexity—the flaw is straightforward to trigger once privileges are held. This places the vulnerability in the Medium severity band: not Critical due to privilege and locality constraints, but not Low because impact is severe if exploited.

Frequently asked questions