Local memory corruption via near-maximum-size packet
Published Aug 4, 2026 · Updated Aug 4, 2026
Integer overflow in Qualcomm Snapdragon Auto Data Network Stack & Connectivity allows local users to corrupt memory with a near-maximum-size packet. Qualcomm identifies packet processing near the maximum permitted size as the trigger but does not disclose the affected function or arithmetic operation. Low-privilege local access is required, and successful exploitation compromises confidentiality, integrity, and availability within the affected component.
Summary
What happened
Integer overflow in Qualcomm Snapdragon Auto Data Network Stack & Connectivity allows local users to corrupt memory with a near-maximum-size packet. Qualcomm identifies packet processing near the maximum permitted size as the trigger but does not disclose the affected function or arithmetic operation. Low-privilege local access is required, and successful exploitation compromises confidentiality, integrity, and availability within the affected component.
The record
- CVE
- CVE-2026-21366
- Published
- Aug 4, 2026
- Updated
- Aug 4, 2026
- Vendor
- Qualcomm
- Product
- Snapdragon
- Classifications
- CWE-190
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 4, 2026CVE publishedPublication date reported by the CVE source.
- Aug 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=LeMansAU
- Affected versionversion=LeMans_AU_LGIT
- Affected versionversion=QAM8255P
- Affected versionversion=QAM8295P
- Affected versionversion=QAM8620P
- Affected versionversion=QAMSRV1H
- Affected versionversion=QAMSRV1M
- Affected versionversion=QCA6574AU
- Affected versionversion=QCA6595
- Affected versionversion=QCA6595AU
- Affected versionversion=QCA6688AQ
- Affected versionversion=QCA6696
- Affected versionversion=QCA6698AQ
- Affected versionversion=QCA6797AQ
- Affected versionversion=QCA8695AU
- Affected versionversion=SA6145P
- Affected versionversion=SA6150P
- Affected versionversion=SA6155P
- Affected versionversion=SA7255P
- Affected versionversion=SA7775P
- Affected versionversion=SA8145P
- Affected versionversion=SA8150P
- Affected versionversion=SA8155P
- Affected versionversion=SA8195P
- Affected versionversion=SA8255P
- Affected versionversion=SA8295P
- Affected versionversion=SA8540P
- Affected versionversion=SA8620P
- Affected versionversion=SA8770P
- Affected versionversion=SA9000P
- Affected versionversion=SRV1H
- Affected versionversion=SRV1L
- Affected versionversion=SRV1M
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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