CVE-2022-49754 Bluetooth: Fix a buffer overflow in mgmt_mesh_add()
A buffer overflow in the Linux kernel Bluetooth mesh management allows attackers to cause memory corruption, potentially leading to code execution or system crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-49754?
CVE-2022-49754 is a high-severity memory corruption vulnerability in Linux kernel, published on 27 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: Fix a buffer overflow in mgmt_mesh_add()
Smatch Warning: net/bluetooth/mgmt_util.c:375 mgmt_mesh_add() error: __memcpy() 'mesh_tx->param' too small (48 vs 50)
Analysis:
'mesh_tx->param' is array of size 48. This is the destination. u8 param[sizeof(struct mgmt_cp_mesh_send) + 29]; // 19 + 29 = 48.
But in the caller 'mesh_send' we reject only when len > 50. len > (MGMT_MESH_SEND_SIZE + 31) // 19 + 31 = 50.
Weakness: CWE-120
Which versions are affected by CVE-2022-49754?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49754?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-49754 being exploited?
There is no known exploitation of CVE-2022-49754 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49754, GHSA-p2cv-98qj-r2qc, UBUNTU-CVE-2022-49754.