# CVE-2026-21384: Qualcomm Snapdragon Memory Corruption in Prepared Commands

Source: https://junglewise.ai/threats/cve-2026-21384-qualcomm-snapdragon-memory-corruption-in-prepared-commands  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-06. Updated: 2026-07-06  
License: CC BY 4.0 with a link back

CVE-2026-21384 · Severity: medium · CVSS 5.3 · Published 2026-07-06

A memory corruption vulnerability exists in several Qualcomm Snapdragon chipsets used in mobile devices, automotive systems, and IoT hardware. An attacker with local access to a device could exploit this flaw to interfere with the device's normal operations or potentially gain unauthorized access to sensitive data. This could lead to system instability or a compromise of the device's security boundaries.

## Quick answers

**Is CVE-2026-21384 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21384 being exploited in the wild.

**How severe is CVE-2026-21384?** Medium severity, with a CVSS score of 5.3, published 6 July 2026.

**Which products and versions are affected?** Qualcomm, Inc. Snapdragon Auto; Qualcomm, Inc. Snapdragon Compute; Qualcomm, Inc. Snapdragon Consumer IOT; Qualcomm, Inc. Snapdragon Industrial IOT; and 4 more.

**Is there a fix for CVE-2026-21384?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-21384 attacked?** It is attacked with local access, in device firmware.

**Am I affected by CVE-2026-21384?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A memory corruption vulnerability (CWE-787: Out-of-bounds Write) exists in Qualcomm Snapdragon firmware. The issue occurs when updating prepared commands using invalid port indices provided by user-space input that exceeds supported read client limits. An attacker with low-privileged local access can trigger this vulnerability, though it requires high complexity to exploit successfully. If exploited, it can lead to a scope cross (S:C), potentially allowing the attacker to impact the integrity and availability of the underlying system or secure environments. Patch information is available in the July 2026 Qualcomm Security Bulletin.

## Affected products

- Qualcomm, Inc. Snapdragon Auto
- Qualcomm, Inc. Snapdragon Compute
- Qualcomm, Inc. Snapdragon Consumer IOT
- Qualcomm, Inc. Snapdragon Industrial IOT
- Qualcomm, Inc. Snapdragon Mobile
- Qualcomm, Inc. FastConnect 6700
- Qualcomm, Inc. FastConnect 6900
- Qualcomm, Inc. FastConnect 7800

## Timeline

- 2026-07-06: disclosed
- 2026-07-06: advisory

## References

- [https://docs.qualcomm.com/product/publicresources/securitybulletin/july-2026-bulletin.html](https://docs.qualcomm.com/product/publicresources/securitybulletin/july-2026-bulletin.html)