What is CVE-2021-34146?

CVE-2021-34146 is a medium-severity vulnerability in Cypress Cyw20735b1. CVSS score: 6.5/10. Published 2021-09-07.

How severe is CVE-2021-34146?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2021-34146 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Cypress Cyw20735b1

CVE-2021-34146

The Bluetooth Classic implementation in the Cypress CYW920735Q60EVB does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and restart (crash) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.

EPSS: 0.006 (44.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Public proof-of-concept exploits

References

cve@mitre.org (x_refsource_MISC, Vendor Advisory)
cve@mitre.org (Technical Description, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-34146?: CVE-2021-34146 is a medium-severity vulnerability in Cypress Cyw20735b1. CVSS score: 6.5/10. Published 2021-09-07.
How severe is CVE-2021-34146?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2021-34146 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.