CVE-2013-2597: Code Aurora ACDB Audio Driver Stack-based Buffer Overflow Vulnerability

CVE-2013-2597 is a stack-based buffer overflow in the Code Aurora audio calibration database (acdb) audio driver. The flaw can allow an attacker who can interact with the driver to escalate privileges on the device. Code Aurora components appear in third-party products such as Qualcomm platforms and Android systems, so the issue can affect a range of mobile and embedded devices that incorporate this driver. Confirm exact product impact against the vendor advisory.

Because the vulnerability resides in a kernel-level audio driver, successful exploitation can give an attacker higher privileges than the calling process, increasing the risk of further compromise of the device or the data it holds. Defenders should treat it as a local privilege-escalation issue in the memory-safety class and prioritize inventory and patching of affected platforms.

How it works

The weakness is classified as CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). In this case the Code Aurora acdb audio driver fails to properly bound data written to a stack buffer. An attacker who can supply crafted input to the driver can overflow that buffer, overwriting adjacent stack memory. Overwriting control data on the stack can redirect execution flow and allow the attacker to run code with the privileges of the driver—typically elevated or kernel privileges—resulting in privilege escalation.

No public exploit mechanics beyond the existence of the stack-based overflow are provided here; specifics of input vectors or required access must be confirmed against the vendor advisory. The CISA summary states only that the overflow allows privilege escalation and that Code Aurora is used in products such as Qualcomm and Android.

Am I affected? How to find it in your systems

The vulnerable component is the Code Aurora ACDB audio driver. It commonly appears in Qualcomm-based Android devices and other third-party products that integrate Code Aurora audio calibration code. Inventory efforts should focus on mobile devices, embedded systems, and any platform known to ship Qualcomm or Code Aurora audio drivers.

• Enumerate devices by manufacturer, chipset, and Android (or other OS) build; check vendor security bulletins for mentions of the acdb driver or CVE-2013-2597.
• On Android devices, examine kernel modules, driver lists, or system properties related to audio calibration; look for references to acdb or Code Aurora audio components.
• Review configuration management and asset databases for Qualcomm or Code Aurora–based hardware; flag any systems whose firmware or kernel has not been updated since the advisory period.
• Because exact affected versions are not listed in the provided facts, treat any unpatched Code Aurora acdb driver as potentially vulnerable until the vendor advisory confirms otherwise.

Telemetry signs of exploitation are not detailed in the facts. Monitor for unexpected privilege escalations, crashes in audio-related kernel modules, or anomalous process behavior that gains elevated rights after interaction with audio interfaces. Correlate such events with device inventory to prioritize investigation.

How to remediate

The required action is to apply updates per vendor instructions. Obtain and install the security update or firmware package that addresses CVE-2013-2597 for each affected product line. Confirm the fixed package name and version directly from the vendor advisory, because no specific version numbers are supplied here.

• Deploy the vendor-supplied patch through your normal mobile-device management or firmware-update process.
• After patching, verify that the acdb driver or related kernel component reports the updated version.
• For devices that cannot receive over-the-air updates, obtain the official image from the manufacturer and reflash according to their guidance.
• As a general hardening step for this class of memory-corruption issues, ensure devices run with the latest available kernel and that unnecessary audio or calibration interfaces are restricted where possible.

If you can't patch immediately

Until the vendor update can be applied, reduce exposure with compensating controls appropriate to a local privilege-escalation vulnerability in a device driver.

• Segment affected devices onto restricted network segments and limit administrative or debugging access that could be used to reach the driver.
• Disable or unload the acdb audio driver if the platform allows it and audio calibration is not required for business function; confirm impact with the vendor first.
• Apply virtual patching or host-based controls that restrict untrusted applications from opening audio-related device nodes or IOCTL interfaces.
• Increase monitoring for privilege-escalation attempts, unexpected kernel module loads, and crashes involving audio drivers; alert on any process that suddenly gains elevated rights.
• Enforce least-privilege application sandboxes and restrict sideloading of untrusted code that might attempt to trigger the overflow.

These measures lower risk but do not eliminate it; schedule the official patch as soon as operationally feasible.

If your data may have been exposed

Actively exploited privilege-escalation vulnerabilities can lead to full device compromise and subsequent data exposure. The facts do not document ransomware use of this CVE, yet any successful escalation still warrants investigation of the affected device for unauthorized access or data exfiltration. Review device logs, check for unexpected accounts or persistence mechanisms, and rotate credentials that may have been present on the device. As an additional check, you can run a free exposure scan of your email address against known breach data sets to determine whether related credentials have appeared in prior incidents.