Kernel memory disclosure via malformed device packets
Published Sep 10, 2026 · Updated Sep 10, 2026
Uninitialized memory disclosure in Silicon Labs CP210x VCP Drivers 11.5.0 and earlier allows local users to read Windows kernel pool data. The silabser.sys driver returns up to 145 bytes of uninitialized kernel pool contents while processing malformed packets supplied by a malicious CP210x device. Exploitation requires a local unprivileged user and control of the attached device; the documented consequence is bounded to kernel-memory disclosure.
Summary
What happened
Uninitialized memory disclosure in Silicon Labs CP210x VCP Drivers 11.5.0 and earlier allows local users to read Windows kernel pool data. The silabser.sys driver returns up to 145 bytes of uninitialized kernel pool contents while processing malformed packets supplied by a malicious CP210x device. Exploitation requires a local unprivileged user and control of the attached device; the documented consequence is bounded to kernel-memory disclosure.
The record
- CVE
- CVE-2026-15418
- Published
- Sep 10, 2026
- Updated
- Sep 10, 2026
- Vendor
- Sigma Designs
- Product
- CP210x USB to UART Bridge VCP Drivers
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 10, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 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=0 <=11.5.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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
No sourced classifications are available.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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