CVE-2022-49754: Bluetooth: Fix a buffer overflow in mgmt_mesh_add()

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-03-27 · updated 2026-06-17
Weakness: CWE-120

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.

Affected products

Linux kernel: from 6.1 before 6.1.9; 6.2-rc1, 6.2-rc2, 6.2-rc3, 6.2-rc4 — fixed in 6.1.9

How to fix

Upgrade to a fixed version: Linux kernel 6.1.9. Check the vendor advisory for mitigations.

References

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