CVE-2025-9558 Bluetooth: Mesh: Out-of-Bound Write in gen_prov_start
An out-of-bounds write in Zephyr's Bluetooth Mesh provisioning allows attackers to corrupt memory, potentially leading to code execution or crashes.
- 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-2025-9558?
CVE-2025-9558 is a high-severity memory corruption vulnerability in zephyrproject-rtos Zephyr, published on 26 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
There is a potential OOB Write vulnerability in the gen_prov_start function in pb_adv.c. The full length of the received data is copied into the link.rx.buf receiver buffer without any validation on the data size.
Weakness: CWE-120
Which versions are affected by CVE-2025-9558?
How do I fix CVE-2025-9558?
No fix has been published for CVE-2025-9558 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-2025-9558 being exploited?
There is no known exploitation of CVE-2025-9558 in the wild and no public exploit code.
Sources
Also known as GHSA-8wvr-688x-68vr.