CVE-2026-5706

Buffer overflow in Bluetooth Mesh SDK when handling extended advertisements

State: Published
Severity: 8.9 High
Published: Aug 27, 2026
Updated: Aug 28, 2026
Reserved: Apr 6, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.9 High	CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:H	Silabs

Weaknesses

CWE-130 Improper Handling of Length Parameter Inconsistency, CWE-787: Out-of-bounds Write

Affected Products

Product	Versions
BT Mesh SDKSilicon Labs	6.1.4, 9.1.0 and earlierAffected

References

https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/a45Vm000000Et6HIAS?operationContext=S1vendor-advisorypermissions-required
https://github.com/SiliconLabs/gecko_sdk/releasespatch

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.