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wiseconnect

The following APIs for the Silcon Labs SiWx91x prior to vesion 3.4.0 failed to check the size of the output buffer of the caller which could lead to data corruption on the host (Cortex-M4) application.sl_si91x_aes
sl_si91x_gcm
sl_si91x_ccm 
sl_si91x_sha

CVE-2025-3873 is a medium-severity vulnerability affecting Silicon Labs' WiseConnect software stack, specifically versions prior to 3.4.0, including version 3.0.0. The vulnerability arises from an out-of-bounds write (CWE-787) in several cryptographic APIs: sl_si91x_aes, sl_si91x_gcm, sl_si91x_ccm, and sl_si91x_sha. These APIs fail to properly validate the size of the output buffer provided by the caller, which can lead to data corruption on the host Cortex-M4 application. The affected device is the Silicon Labs SiWx91x wireless microcontroller. The vulnerability does not require user interaction or authentication but does require low-level privileges (PR:L) to exploit. The CVSS 4.0 base score is 6.0, indicating a medium severity level. The attack vector is network-based (AV:N), but the attack complexity is high (AC:H), meaning exploitation requires specific conditions or expertise. The impact on confidentiality is low, but the impact on integrity and availability is high, as data corruption could cause application malfunction or denial of service. No known exploits are currently reported in the wild, and no patches are linked yet, though the issue is reserved and published as of mid-2025. The vulnerability affects cryptographic operations, which are critical for secure communications and data protection in embedded IoT and wireless devices using the SiWx91x platform.

Detailed information about CVE-2025-3873: CWE-787 Out-of-bounds Write in silabs.com WiseConnect affecting silabs.com WiseConnect. Get real-time updates, technic

CVE-2025-3873: CWE-787 Out-of-bounds Write in silabs.com WiseConnect - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-3873: CWE-787 Out-of-bounds Write in silabs.com WiseConnect

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