CVE-2023-2234 BT HCI host union variant confusion
A malicious Bluetooth controller can execute arbitrary code on the Zephyr host due to a union variant confusion vulnerability.
- 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-2023-2234?
CVE-2023-2234 is a medium-severity memory corruption vulnerability in Zephyrproject Zephyr, published on 10 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Union variant confusion allows any malicious BT controller to execute arbitrary code on the Zephyr host.
Weakness: CWE-843
Which versions are affected by CVE-2023-2234?
It affects 1 product.
Products include Zephyrproject Zephyr.
How do I fix CVE-2023-2234?
No fix has been published for CVE-2023-2234 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-2023-2234 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-2234 exists.
Other vulnerabilities in Zephyrproject Zephyr
- CVE-2026-5067 Out-of-bounds read/write in HTTP WebSocket upgrade via non-null-terminated Sec-WebSocket-Key
- CVE-2022-3806 Bluetooth HCI Error Handling Double Free
- CVE-2017-14199 Memory corruption in getaddrinfo
- CVE-2018-1000800 Null dereference in n/a
- CVE-2021-3329 DOS: Incorrect handling of the initial HCI ACL_MTU handshake packet leads to crash of bluetooth host layer