Host memory corruption via unchecked crypto output buffers
Published Jul 25, 2025 · Updated Jul 25, 2025
Out-of-bounds writes in Silicon Labs WiSeConnect SDK before 3.4.0 allow remote authenticated users to corrupt Cortex-M4 host memory. The sl_si91x_aes, sl_si91x_gcm, sl_si91x_ccm, and sl_si91x_sha APIs write results into caller-supplied output buffers without first verifying their capacity. Exploitation requires low-privilege network access and a host application that passes attacker-influenced work to an affected API; the documented consequence is host data corruption.
Summary
What happened
Out-of-bounds writes in Silicon Labs WiSeConnect SDK before 3.4.0 allow remote authenticated users to corrupt Cortex-M4 host memory. The sl_si91x_aes, sl_si91x_gcm, sl_si91x_ccm, and sl_si91x_sha APIs write results into caller-supplied output buffers without first verifying their capacity. Exploitation requires low-privilege network access and a host application that passes attacker-influenced work to an affected API; the documented consequence is host data corruption.
The record
- CVE
- CVE-2025-3873
- Published
- Jul 25, 2025
- Updated
- Jul 25, 2025
- Vendor
- Sigma Designs
- Product
- WiSeConnect SDK
- Classifications
- CWE-787, CAPEC-100
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 25, 2025CVE publishedPublication date reported by the CVE source.
- Jul 25, 2025Record 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=3.0.0 <3.4.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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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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