Description
Certain Cypress (and Broadcom) Wireless Combo chips such as CYW43455, when a 2021-01-26 Bluetooth firmware update is not present, allow a Bluetooth outage via a "Spectra" attack.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | linux-firmware-raspi2 | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bcm43xx-firmware | 20180314-14.1 | openSUSE-SU-2024:11689-1 |
Advisories 1
- openSUSE-SU-2024:11689-1 bcm43xx-firmware-20180314-14.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://www.informatik.tu-darmstadt.de/seemoo/team_seemoo/jiska_classen/index.en.jsp
- https://github.com/RPi-Distro/bluez-firmware/commit/8445a53ce2c51a77472b908a0c8f6f8e1fa5c37a
- https://security-tracker.debian.org/tracker/CVE-2020-10370
- https://bugzilla.redhat.com/show_bug.cgi?id=2052676
- https://www.informatik.tu-darmstadt.de/fb20/aktuelles_fb20/fb20_neuigkeiten/neuigkeiten_fb20_details_203136.de.jsp