CVE-2026-53052

What it actually does

This vulnerability is an incorrect memory access flaw in the Linux kernel Qualcomm ASoC QDSP6 audio topology handling code. The vulnerable logic accesses widget private data before confirming that the widget is the expected type and is backed by a DSP graph, container, and module. If a virtual or otherwise unsupported widget is processed, the kernel may dereference invalid or unintended memory. The most likely technical outcomes are kernel crash, denial of service, or unpredictable kernel behavior on affected Qualcomm audio/DSP platforms; privilege escalation cannot be ruled out for memory-corruption-class kernel bugs, but no public exploit or active exploitation is currently indicated.

Why it matters to the business

Systems using affected Linux kernels on Qualcomm audio/DSP hardware may be vulnerable to local stability-impacting attacks that can crash the device or disrupt audio/DSP-dependent services. Because this is not in CISA KEV, has very low EPSS, and has no known exploit maturity, broad internet-scale exploitation is unlikely; however, embedded, mobile, IoT, automotive, and appliance-like Linux deployments can have long patch cycles, making remediation important where Qualcomm QDSP6 audio support is enabled.

How an attack unfolds

An attacker would generally need local access or a way to influence audio topology/widget handling on an affected Linux system. They would cause the kernel's Qualcomm QDSP6 ASoC topology code to process a widget that does not have the expected DSP graph/container/module backing. Because the vulnerable code accesses private widget data before validating the widget type, the kernel can perform an invalid memory access. In practical terms, exploitation would most likely manifest as a kernel oops, panic, device reboot, or service disruption. There is no current evidence from the provided data of weaponized exploit code, ransomware use, or named threat actor exploitation.

How to fix it

Upgrade to a Linux kernel version that includes the upstream fix for the Qualcomm ASoC QDSP6 topology widget-type validation issue. If consuming kernels through a Linux distribution, Android/device vendor, SoC vendor BSP, or appliance firmware channel, apply the vendor security update that backports this fix. No exact fixed package versions were provided in the input, so remediation should be validated against vendor advisories and kernel changelogs for the fix described as 'ASoC: qcom: qdsp6: topology: check widget type before accessing data.' Where immediate patching is not possible, reduce exposure by disabling unused Qualcomm QDSP6/ASoC audio topology functionality where operationally safe, restricting local shell/app access, limiting untrusted workloads on affected devices, and ensuring automatic reboot/crash recovery is monitored rather than silently masking repeated crashes.

How to confirm the fix worked

Confirm the running kernel or vendor firmware includes the fix by checking the installed kernel version, distribution/vendor security advisory status, or the presence of the patch that validates widget type before accessing QDSP6 topology private data. On source-based builds, verify the relevant Qualcomm ASoC QDSP6 topology code checks the widget type before dereferencing DSP graph/container/module private data. On deployed systems, confirm whether Qualcomm QDSP6/ASoC drivers are present or loaded by inspecting kernel configuration, loaded modules, device tree/platform inventory, and dmesg output. After patching, monitor kernel logs for absence of recurring ASoC/QDSP6 topology-related oops, panic, NULL-pointer dereference, or invalid memory access events during audio initialization and normal audio use.

Typical attack path

1. Gain local code execution, shell access, application-level access, or another path that can interact with the affected audio subsystem or trigger topology parsing on a vulnerable system.
2. Trigger processing of a crafted, malformed, or unexpected ASoC topology/widget state involving Qualcomm QDSP6 audio components.
3. Cause the vulnerable kernel code to access widget private data before confirming the widget is backed by the expected DSP graph/container/module objects.
4. Induce invalid memory access in kernel context.
5. Achieve denial of service through kernel oops, panic, hang, reboot, or unpredictable audio/DSP subsystem behavior.

How to detect it

To determine whether this was already exploited or triggered, review kernel logs, persistent journal logs, crash dumps, pstore/ramoops records, watchdog reset logs, and device reboot telemetry for crashes around Qualcomm ASoC/QDSP6 audio topology processing. Useful sources include dmesg, /var/log/kern.log, /var/log/messages, journalctl -k output, Android logcat/kernel logs on Android-derived devices, kdump/vmcore analysis, pstore files under /sys/fs/pstore, and vendor crash-reporting telemetry. Look for kernel oops or panic events containing ASoC, qdsp6, q6apm, audioreach, topology, widget, NULL pointer dereference, invalid memory access, or call traces in the Qualcomm audio driver path. Because this vulnerability does not have a unique network signature and exploitation would likely be local, absence of network indicators does not prove absence of exploitation. Correlate any crash events with local user activity, newly installed applications, audio service restarts, topology/profile changes, firmware updates, or repeated attempts to initialize audio hardware.

• ASoC: qcom
• qdsp6
• q6apm
• audioreach
• topology
• widget
• BUG: kernel NULL pointer dereference
• Unable to handle kernel NULL pointer dereference
• Unable to handle kernel paging request
• Internal error: Oops
• Kernel panic - not syncing
• Call trace:
• /sys/fs/pstore
• /proc/config.gz
• CONFIG_SND_SOC_QDSP6
• CONFIG_SND_SOC_QCOM

What your security team should do

• Prioritize patching affected Qualcomm-based Linux devices, especially embedded, mobile, appliance, IoT, automotive, or kiosk systems where kernel updates are infrequent and device crashes have operational impact.
• Inventory systems that run Linux kernels with Qualcomm ASoC QDSP6 audio support enabled or compiled in.
• Track vendor kernel, firmware, Android/BSP, or distribution advisories for the backported fix because exact fixed versions were not provided.
• Treat this as a lower-likelihood but potentially high-disruption local kernel issue: EPSS is low, KEV is false, ransomware use is not indicated, and exploit maturity is currently none.
• Restrict local access and untrusted application execution on affected systems until patched.
• Enable alerting for repeated kernel oops, panic, reboot, watchdog reset, or audio/DSP driver faults involving ASoC, qdsp6, q6apm, or topology handling.
• For fleets with safety, availability, or field-service constraints, test the patched kernel or firmware against audio functionality before broad rollout.