CVE-2026-21385: Qualcomm Multiple Chipsets Memory Corruption Vulnerability

Qualcomm Multiple Chipsets contain a memory corruption vulnerability that occurs during memory allocation when alignments are applied. The issue is tracked as CVE-2026-21385 and is rooted in CWE-190. Because the affected components are widely used in mobile, embedded, and network devices, the flaw can expose systems that rely on those chipsets to memory-safety failures.

Organizations should treat any Qualcomm chipset deployment as potentially in scope until they confirm status against the vendor advisory.

How it works

The weakness is an integer overflow or wraparound (CWE-190) that surfaces while calculating aligned memory allocations. An attacker who can influence the size or alignment parameters supplied to the allocator may cause the arithmetic result to wrap, producing an incorrect allocation size. Subsequent operations on the undersized or misaligned buffer can then corrupt adjacent memory.

• The flaw is triggered in the alignment-handling path of the memory allocator present in multiple Qualcomm chipsets.
• Successful abuse requires the ability to reach the affected allocation routine with attacker-controlled values.
• No further exploit mechanics are documented in the available summary.

Am I affected? How to find it in your systems

Qualcomm chipsets appear in smartphones, tablets, IoT devices, automotive systems, and some networking equipment. Inventory begins with hardware asset lists that record chipset or SoC model numbers, followed by firmware or driver versions on those devices.

• Query device management consoles, MDM platforms, or procurement records for any Qualcomm-branded silicon.
• Where source or binary inspection is possible, examine memory-allocation routines that perform explicit alignment calculations.
• Monitor for unexpected crashes, heap-related faults, or anomalous allocation failures in logs from affected devices; such signals are nonspecific but warrant investigation.
• Exact affected models and configurations must be confirmed against the vendor advisory.

How to remediate

Apply the vendor-supplied update or mitigation instructions referenced in the official advisory. When the chipset is used inside a cloud-hosted service, also follow any applicable BOD 22-01 requirements.

• Prioritize patching devices that accept untrusted input or run exposed services.
• After patching, verify that the updated firmware or driver is active through normal device-health checks.
• If the advisory lists configuration changes that reduce exposure, apply them as part of the remediation workflow.

If you can't patch immediately

Until a fix can be deployed, reduce the attack surface by isolating devices that contain the vulnerable chipsets on segmented networks. Where technically feasible, apply virtual patching or filtering rules that block malformed allocation requests before they reach the chipset driver.

• Disable or restrict features that invoke the alignment-sensitive allocator if the vendor identifies such a control.
• Increase monitoring of memory-related error logs and outbound traffic from affected systems.
• If no acceptable mitigation exists, discontinue use of the product as stated in CISA guidance.

If your data may have been exposed

Memory-corruption issues in widely deployed hardware can contribute to later breaches. Organizations that suspect exposure should review available telemetry and can run a free exposure scan of their email addresses against known breach datasets to identify any associated account compromise.