CVE-2021-34149

MEDIUM
6.5
CVSS Score
Published: September 7, 2021 at 06:16 AM UTC
Updated: June 17, 2026 at 03:55 AM UTC
2 products affected across 1 vendorCC256XCQFN Em FirmwareCc256Xcqfn-Em

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.5%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
ti-cc256xcqfn-em (same device)
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

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

CVSS

Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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