High · 8.9 CVE-2026-5706 EUVD-2026-67297GHSA-f29w-mc54-fh2c

Buffer overflow in Bluetooth Mesh SDK when handling extended advertisements

Published Aug 27, 2026 · Updated Aug 28, 2026 · Assigned by Silabs

Vendor: Silicon Labs Product: BT Mesh SDK

Description

In Bluetooth Mesh SDK 6.1.4 and earlier, malformed extended advertisements can trigger out-of-bounds writes leading to stack corruption and remote code execution. These messages must come from a device that has already joined the network. Only provisioners supporting extended advertisements may be impacted.

Affected products

Vendor	Product	Affected	Fixed
Silicon Labs	BT Mesh SDK	≤ 6.1.4, 9.1.0	—

References

https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/a45Vm000000Et6HIAS?operationContext=S1 vendor-advisory permissions-required
https://github.com/SiliconLabs/gecko_sdk/releases patch