CVE-2026-21379 - Vulnerability Details

Description

Memory Corruption when allocating memory with sizes that exceed the maximum allowed value.

Published: 2026-07-06

Score: 7.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

The vulnerability is a buffer over‑read (CWE‑126) that occurs when memory is allocated with sizes exceeding the maximum allowed value. This can result in memory corruption that affects program data integrity.

Affected Systems

Qualcomm Snapdragon chipsets; any device that incorporates a Snapdragon processor could be impacted unless a vendor patch has been applied, as detailed in Qualcomm’s July 2026 security bulletin. Specific affected firmware versions are not disclosed.

Risk and Exploitability

The CVSS score of 7.8 indicates high severity, while the EPSS score of less than 1% suggests a very low probability of exploitation. The vulnerability is not listed in the CISA KEV catalog. No specific attack vector is disclosed, so the threat assessment relies on the CVSS metrics alone.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Qualcomm, Inc.

Snapdragon

unaffected

Version	Status	Constraints
`AQT1000`	affected	—
`Cologne`	affected	—
`FastConnect 6200`	affected	—
`FastConnect 6700`	affected	—
`FastConnect 6800`	affected	—
`FastConnect 6900`	affected	—
`FastConnect 7800`	affected	—
`IQX5121`	affected	—
`IQX7181`	affected	—
`QCA0000`	affected	—
`QCA6391`	affected	—
`QCA6420`	affected	—
`QCA6430`	affected	—
`QCM5430`	affected	—
`QCM6490`	affected	—
`Qualcomm Video Collaboration VC3 Platform`	affected	—
`SC8380XP`	affected	—
`Snapdragon 7c+ Gen 3 Compute`	affected	—
`Snapdragon 8c Compute Platform "Poipu Lite"`	affected	—
`Snapdragon 8c Compute Platform (SC8180XP-AD) "Poipu Lite"`	affected	—
`Snapdragon 8cx Compute Platform`	affected	—
`Snapdragon 8cx Compute Platform "Poipu Pro"`	affected	—
`Snapdragon 8cx Gen 2 5G Compute Platform`	affected	—
`Snapdragon 8cx Gen 2 5G Compute Platform "Poipu Pro"`	affected	—
`Snapdragon 8cx Gen 3 Compute Platform`	affected	—
`WCD9340`	affected	—
`WCD9341`	affected	—
`WCD9370`	affected	—
`WCD9375`	affected	—
`WCD9378C`	affected	—
`WCD9380`	affected	—
`WCD9385`	affected	—
`WSA8810`	affected	—
`WSA8815`	affected	—
`WSA8830`	affected	—
`WSA8835`	affected	—
`WSA8840`	affected	—
`WSA8845`	affected	—
`WSA8845H`	affected	—
`X2000077`	affected	—
`X2000086`	affected	—
`X2000090`	affected	—
`X2000092`	affected	—
`X2000094`	affected	—
`XG101002`	affected	—
`XG101032`	affected	—
`XG101039`	affected	—

No data.

Vendor Product Confidence Versions

Qualcomm

Snapdragon

95%

Version	Status	Scheme	Platform
`AQT1000`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`Cologne`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`FastConnect 6200`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`FastConnect 6700`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`FastConnect 6800`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`FastConnect 6900`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`FastConnect 7800`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`IQX5121`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`IQX7181`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`QCA0000`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`QCA6391`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`QCA6420`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`QCA6430`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`QCM5430`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`QCM6490`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`Qualcomm Video Collaboration VC3 Platform`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`SC8380XP`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`Snapdragon 7c+ Gen 3 Compute`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`Snapdragon 8c Compute Platform "Poipu Lite"`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`Snapdragon 8c Compute Platform (SC8180XP-AD) "Poipu Lite"`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`Snapdragon 8cx Compute Platform`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`Snapdragon 8cx Compute Platform "Poipu Pro"`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`Snapdragon 8cx Gen 2 5G Compute Platform`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`Snapdragon 8cx Gen 2 5G Compute Platform "Poipu Pro"`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`Snapdragon 8cx Gen 3 Compute Platform`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WCD9340`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WCD9341`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WCD9370`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WCD9375`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WCD9378C`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WCD9380`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WCD9385`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WSA8810`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WSA8815`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WSA8830`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WSA8835`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WSA8840`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WSA8845`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`WSA8845H`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`X2000077`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`X2000086`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`X2000090`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`X2000092`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`X2000094`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`XG101002`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`XG101032`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']
`XG101039`	affected	generic	['snapdragon_compute', 'snapdragon_industrial_iot']

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Obtain and install the firmware update for Qualcomm Snapdragon processors as distributed in the July 2026 security bulletin.
If a patch is not yet available, add bounds checking to any custom code that requests memory allocations, ensuring allocation sizes do not exceed the allowed maximum and mitigating the buffer over‑read (CWE‑126).
Continuously monitor device logs for crashes or abnormal memory usage that may arise from a buffer over‑read (CWE‑126), and replace the vulnerable component with the patched version as soon as possible.

Generated by OpenCVE AI on July 29, 2026 at 16:07 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0007.

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://docs.qualcomm.com/product/publicresources/securitybulletin/july-2026-bulletin.html

History

Mon, 06 Jul 2026 22:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Qualcomm Qualcomm snapdragon
Vendors & Products		Qualcomm Qualcomm snapdragon

Mon, 06 Jul 2026 21:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Mon, 06 Jul 2026 20:30:00 +0000

Type	Values Removed	Values Added
Description		Memory Corruption when allocating memory with sizes that exceed the maximum allowed value.
Title		Buffer Over-read in Windows Compute
Weaknesses		CWE-126
References		https://docs.qualcomm.com/product/publicresources/securitybulletin/july-2026-bulletin.html
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`

Subscriptions

Qualcomm Snapdragon

MITRE

Status: PUBLISHED

Assigner: qualcomm

Published: 2026-07-06T20:09:38.160Z

Updated: 2026-07-07T03:56:18.731Z

Reserved: 2025-12-17T04:35:45.743Z

Link: CVE-2026-21379

Vulnrichment

Updated: 2026-07-06T20:55:07.755Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-07-29T16:15:03Z

Weaknesses

CWE-126
Buffer Over-read

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact total

Subscriptions

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