CVE-2026-21366
Integer Overflow or Wraparound in Data Network Stack & Connectivity
Description
Memory corruption while processing a packet with a size close to the maximum allowed value.
INFO
Published Date :
Aug. 4, 2026, 4:16 p.m.
Last Modified :
Aug. 6, 2026, 6:33 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-21366
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 2cfc7d3e-20d3-47ac-8db7-1b7285aff15f | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Apply software updates to address memory corruption.
- Validate packet size handling logic.
- Monitor system stability after update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-21366.
| URL | Resource |
|---|---|
| https://docs.qualcomm.com/product/publicresources/securitybulletin/august-2026-bulletin.html | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-21366 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-21366
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-21366 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-21366 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 06, 2026
Action Type Old Value New Value Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:lemans_au_lgit_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:lemans_au_lgit:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:lemansau_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:lemansau:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qam8255p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qam8255p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qam8295p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qam8295p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qam8620p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qam8620p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qamsrv1h_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qamsrv1h:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qamsrv1m_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qamsrv1m:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca6574au_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca6574au:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca6595_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca6595:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca6595au_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca6595au:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca6688aq_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca6688aq:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca6696_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca6696:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca6698aq_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca6698aq:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca6797aq_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca6797aq:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:qca8695au_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:qca8695au:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa6145p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa6145p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa6150p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa6150p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa6155p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa6155p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa7255p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa7255p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa7775p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa7775p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa8145p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa8145p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa8150p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa8150p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa8155p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa8155p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa8195p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa8195p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa8255p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa8255p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa8295p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa8295p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa8540p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa8540p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa8620p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa8620p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa8770p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa8770p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:sa9000p_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:sa9000p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:srv1h_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:srv1h:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:srv1l_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:srv1l:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:qualcomm:srv1m_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:qualcomm:srv1m:-:*:*:*:*:*:*:* Added Reference Type Qualcomm, Inc.: https://docs.qualcomm.com/product/publicresources/securitybulletin/august-2026-bulletin.html Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 05, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-21366', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-04T16:00:51.375673Z'} {'id': 'CVE-2026-21366', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-04T00:00:00+00:00'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 04, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-21366', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-04T16:00:51.375673Z'} -
New CVE Received by [email protected]
Aug. 04, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Qualcomm, Inc.', 'product': 'Snapdragon', 'versions': [{'status': 'affected', 'version': 'LeMans_AU_LGIT'}, {'status': 'affected', 'version': 'LeMansAU'}, {'status': 'affected', 'version': 'QAM8255P'}, {'status': 'affected', 'version': 'QAM8295P'}, {'status': 'affected', 'version': 'QAM8620P'}, {'status': 'affected', 'version': 'QAMSRV1H'}, {'status': 'affected', 'version': 'QAMSRV1M'}, {'status': 'affected', 'version': 'QCA6574AU'}, {'status': 'affected', 'version': 'QCA6595'}, {'status': 'affected', 'version': 'QCA6595AU'}, {'status': 'affected', 'version': 'QCA6688AQ'}, {'status': 'affected', 'version': 'QCA6696'}, {'status': 'affected', 'version': 'QCA6698AQ'}, {'status': 'affected', 'version': 'QCA6797AQ'}, {'status': 'affected', 'version': 'QCA8695AU'}, {'status': 'affected', 'version': 'SA6145P'}, {'status': 'affected', 'version': 'SA6150P'}, {'status': 'affected', 'version': 'SA6155P'}, {'status': 'affected', 'version': 'SA7255P'}, {'status': 'affected', 'version': 'SA7775P'}, {'status': 'affected', 'version': 'SA8145P'}, {'status': 'affected', 'version': 'SA8150P'}, {'status': 'affected', 'version': 'SA8155P'}, {'status': 'affected', 'version': 'SA8195P'}, {'status': 'affected', 'version': 'SA8255P'}, {'status': 'affected', 'version': 'SA8295P'}, {'status': 'affected', 'version': 'SA8540P'}, {'status': 'affected', 'version': 'SA8620P'}, {'status': 'affected', 'version': 'SA8770P'}, {'status': 'affected', 'version': 'SA9000P'}, {'status': 'affected', 'version': 'SRV1H'}, {'status': 'affected', 'version': 'SRV1L'}, {'status': 'affected', 'version': 'SRV1M'}], 'platforms': ['Snapdragon Auto'], 'defaultStatus': 'unaffected'}] Added Description Memory corruption while processing a packet with a size close to the maximum allowed value. Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-190 Added Reference https://docs.qualcomm.com/product/publicresources/securitybulletin/august-2026-bulletin.html