CVE catalog
CVE-2021-34147
bluez-firmware: CVE-2021-34147
- Severity
- Medium
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.58% · Oct 25, 2026
The Bluetooth Classic implementation in the Cypress WICED BT stack through 2.9.0 for CYW20735B1 does not properly handle the reception of a malformed LMP timing accuracy response followed by multiple reconnections to the link slave, allowing attackers to exhaust device BT resources and eventually trigger a crash via multiple attempts of sending a crafted LMP timing accuracy response followed by a sudden reconnection with a random BDAddress.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | bluez-firmware | sid | 1.2-13 | fixed |
| Debian | bluez-firmware | forky | 1.2-13 | fixed |
| Debian | bluez-firmware | trixie | 1.2-13 | fixed |
| Debian | bluez-firmware | bookworm | 1.2-9 | fixed |
| Ubuntu | bluez-firmware | 22.04 | 1.2-7 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | bluez-firmware | source | sid | 1.2-8 | not yet assigned | Not reported | [1024356] |
| Debian | bluez-firmware | source | forky | 1.2-8 | not yet assigned | Not reported | [1024356] |
| Debian | bluez-firmware | source | trixie | 1.2-8 | not yet assigned | Not reported | [1024356] |
| Debian | bluez-firmware | source | bookworm | 1.2-8 | not yet assigned | Not reported | [1024356] |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [bluez-firmware]Fixed
Details (2)
1.2-9· all · bookwormFixed · Fixed:
1.2-8dsa · bluez-firmware · debian · bookworm; dsa · bluez-firmware · debian · 12
1.2-9· all · bookwormFixed · Fixed:
1.2-8dsa · bluez-firmware · debian · bookworm; dsa · bluez-firmware · debian · 12
[Debian 13 (Trixie)]
- [bluez-firmware]Fixed
Details (2)
1.2-13· all · trixieFixed · Fixed:
1.2-8dsa · bluez-firmware · debian · 13
1.2-13· all · trixieFixed · Fixed:
1.2-8dsa · bluez-firmware · debian · 13
Observed: