UBUNTU-CVE-2021-34146

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Source
https://ubuntu.com/security/CVE-2021-34146
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-34146.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-34146
Upstream
Published
2021-09-07T07:15:00Z
Modified
2025-09-08T16:47:13Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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 LMPAURand packets after the paging procedure.

References

Affected packages

Ubuntu:22.04:LTS / bluez-firmware

Package

Name
bluez-firmware
Purl
pkg:deb/ubuntu/bluez-firmware@1.2-7?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2-7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.2-7",
            "binary_name": "bluez-firmware"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-34146.json"