CVE-2026-21366

Analyzed Analyzed - Analysis Complete

Memory Corruption in Qualcomm Chipset Firmware

Publication date: 2026-08-04

Last updated on: 2026-08-06

Assigner: Qualcomm, Inc.

Description

Memory corruption while processing a packet with a size close to the maximum allowed value.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-04

Last Modified

2026-08-06

Generated

2026-08-24

AI Q&A

2026-08-04

EPSS Evaluated

2026-08-23

NVD

CVE-2026-21366

EUVD

EUVD-2026-52728

Affected Vendors & Products

Vendor	Product	Version / Range
qualcomm	lemans_au_lgit_firmware	*
qualcomm	lemansau_firmware	*
qualcomm	qam8255p_firmware	*
qualcomm	qam8295p_firmware	*
qualcomm	qam8620p_firmware	*
qualcomm	qamsrv1h_firmware	*
qualcomm	qamsrv1m_firmware	*
qualcomm	qca6574au_firmware	*
qualcomm	qca6595_firmware	*
qualcomm	qca6595au_firmware	*
qualcomm	qca6688aq_firmware	*
qualcomm	qca6696_firmware	*
qualcomm	qca6698aq_firmware	*
qualcomm	qca6797aq_firmware	*
qualcomm	qca8695au_firmware	*
qualcomm	sa6145p_firmware	*
qualcomm	sa6150p_firmware	*
qualcomm	sa6155p_firmware	*
qualcomm	sa7255p_firmware	*
qualcomm	sa7775p_firmware	*
qualcomm	sa8145p_firmware	*
qualcomm	sa8150p_firmware	*
qualcomm	sa8155p_firmware	*
qualcomm	sa8195p_firmware	*
qualcomm	sa8255p_firmware	*
qualcomm	sa8295p_firmware	*
qualcomm	sa8540p_firmware	*
qualcomm	sa8620p_firmware	*
qualcomm	sa8770p_firmware	*
qualcomm	sa9000p_firmware	*
qualcomm	srv1h_firmware	*
qualcomm	srv1l_firmware	*
qualcomm	srv1m_firmware	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This is a memory corruption vulnerability that occurs when processing a network packet with a size near the maximum allowed limit. It can lead to unauthorized code execution or system crashes due to improper memory handling.

Detection Guidance

This vulnerability involves memory corruption from processing oversized packets. Detection requires monitoring for abnormal memory usage or crashes when handling large network packets. Check system logs for segmentation faults or memory errors after packet processing. Use tools like tcpdump or Wireshark to capture and inspect network traffic for unusually large packets near the maximum allowed size.

Impact Analysis

An attacker could exploit this to execute arbitrary code on your system, gain elevated privileges, or cause denial-of-service conditions. It primarily affects systems processing network packets.

Compliance Impact

The vulnerability involves memory corruption from processing oversized packets, which could lead to unauthorized code execution or data exposure. This may impact compliance with GDPR by risking personal data breaches or HIPAA by compromising protected health information if exploited in relevant systems.

Mitigation Strategies

Apply vendor patches or updates if available. Monitor network traffic for unusual packet sizes close to maximum allowed values. Restrict access to vulnerable systems until patched.

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