CVE-2026-5706 Buffer overflow in Bluetooth Mesh SDK when handling extended advertisements
Remote attackers with network access can trigger stack corruption and execute code via malformed extended advertisements in the Bluetooth Mesh SDK.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5706?
CVE-2026-5706 is a high-severity memory corruption vulnerability in Silicon Labs BT Mesh SDK, published on 27 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-130
Which versions are affected by CVE-2026-5706?
How do I fix CVE-2026-5706?
No fix has been published for CVE-2026-5706 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-5706 being exploited?
There is no known exploitation of CVE-2026-5706 in the wild and no public exploit code.
Sources
Also known as GHSA-f29w-mc54-fh2c.