Historical catalog analysis: CISA added this entry on March 03, 2026. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.
What the vulnerability is
CVE-2026-21385 is a memory corruption vulnerability (CWE-190) affecting multiple Qualcomm chipsets. The flaw occurs during the process of using alignments for memory allocation. This vulnerability was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on March 3, 2026.
Exposure and applicability
This vulnerability applies to organizations utilizing hardware powered by affected Qualcomm chipsets. Because these components are integrated into a wide variety of devices by different Original Equipment Manufacturers (OEMs), exposure is not universal across all Qualcomm hardware but depends on the specific chipset model and the firmware version provided by the device manufacturer.
Remediation priorities
Given its status in the CISA KEV catalog, this vulnerability should be prioritized for remediation. Our analysis suggests the following priority sequence:
- Inventory Identification: Identify all assets utilizing Qualcomm chipsets within the environment.
- OEM Coordination: Since patches are delivered via device manufacturers rather than directly from the chipset vendor to the end-user, security teams must verify patching status with their specific OEMs.
- Patch Deployment: Apply updates as specified in the March 1, 2026, Android Security Bulletin or other OEM-specific guidance.
- Decommissioning: In scenarios where an OEM does not provide a mitigation or patch for a legacy device, the source suggests discontinuing use of the product.
How to validate remediation
Verification must go beyond a simple version check, as chipset-level fixes are bundled into broader system updates. To verify that exposure has been reduced, defenders should:
- Cross-Reference Build Numbers: Compare the installed firmware build number against the specific patched versions listed by the OEM for CVE-2026-21385.
- Verify Update Application: Confirm through device management tools that the March 2026 security update (or later) has been successfully applied to the hardware.
Limits and open questions
There are several unknowns regarding this vulnerability. The source does not specify which exact Qualcomm chipset models are affected, leaving that determination to the individual OEMs. Additionally, while CISA has flagged the vulnerability as known exploited, it remains unknown if it is being utilized by ransomware campaigns.
Residual risk remains for devices that have reached end-of-life (EOL) and no longer receive OEM updates; for these assets, no software-based mitigation is available to address the underlying memory corruption flaw.
Source and editorial note
CVE-2026-21385: Qualcomm Multiple Chipsets Memory Corruption Vulnerability · Source date: March 03, 2026 · Retrieved August 31, 2026.
Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.
Archive date: March 06, 2026. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 19, 2026 at 00:25 UTC.
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