CVE-2021-34149

MEDIUM
Published Sep 7, 20214y ago · Modified Jun 17, 20262w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Sep 7, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

Description

The Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM does not properly handle the reception of continuous LMP_AU_Rand packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Adjacent
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
No Patch Available

Affected Products 2

VendorProductVersionRange
ticc256xcqfn-em_firmware*any
ticc256xcqfn-em*any

References 3

  • dl.packetstormsecurity.net https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
    Technical DescriptionThird Party Advisory
  • ti.com https://www.ti.com/product/CC2564C
    ProductVendor Advisory
  • ti.com https://www.ti.com/tool/CC256XC-BT-SP#primary-sw
    ProductVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.