# CVE-2026-21369: Qualcomm Snapdragon memory corruption in flash command handling

Source: https://junglewise.ai/threats/cve-2026-21369-qualcomm-snapdragon-memory-corruption-in-flash-command-handling  
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-2026-21369 · Severity: medium · CVSS 5.3 · Published 2026-07-06

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

## Quick answers

**Is CVE-2026-21369 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21369 being exploited in the wild.

**How severe is CVE-2026-21369?** Medium severity, with a CVSS score of 5.3, published 6 July 2026.

**Which products and versions are affected?** Qualcomm, Inc. Snapdragon Mobile FastConnect 6200, 6700, 6900, 7800, G1 Gen 1, G3x Gen 2, IQ9 Series, QCM2290, QCM4490, QCM6490, QCS2290, QCS4490, and others; Qualcomm, Inc. Snapdragon Auto; Qualcomm, Inc. Snapdragon Compute; Qualcomm, Inc. Snapdragon Consumer IOT; and 2 more.

**Is there a fix for CVE-2026-21369?** 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-2026-21369 attacked?** It is attacked with local access, in device firmware.

**Am I affected by CVE-2026-21369?** 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

This vulnerability is classified as an Out-of-bounds Write (CWE-787) within the firmware handling flash commands. The root cause is a synchronization issue where outdated LED count values are utilized after they have been modified by userspace, leading to memory corruption. An attacker with low-privileged local access can exploit this flaw, though the attack complexity is high. Successful exploitation can result in a scope change, potentially allowing the attacker to impact the integrity, confidentiality, and availability of the system. Qualcomm has addressed this in their July 2026 security bulletin.

## Affected products

- Qualcomm, Inc. Snapdragon Mobile FastConnect 6200, 6700, 6900, 7800, G1 Gen 1, G3x Gen 2, IQ9 Series, QCM2290, QCM4490, QCM6490, QCS2290, QCS4490, and others
- Qualcomm, Inc. Snapdragon Auto
- Qualcomm, Inc. Snapdragon Compute
- Qualcomm, Inc. Snapdragon Consumer IOT
- Qualcomm, Inc. Snapdragon Industrial IOT
- Qualcomm, Inc. Snapdragon Wearables

## Timeline

- 2026-07-06: advisory: Qualcomm published the security bulletin and CVE details.

## References

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