DescriptionThe Bluetooth Classic implementation in the Cypress WICED BT stack through 2.9.0 for CYW20735B1 devices does not properly handle the reception of LMP_max_slot with a greater ACL Length after completion of the LMP setup procedure, allowing attackers in radio range to trigger a denial of service (firmware crash) via a crafted LMP packet.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1024356

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
bluez-firmware (PTS)buster/non-free, bullseye/non-free1.2-4fixed
sid/non-free-firmware, trixie/non-free-firmware, bookworm/non-free-firmware1.2-9fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
bluez-firmwaresourcebuster(not affected)
bluez-firmwaresourcebullseye(not affected)


[bullseye] - bluez-firmware <not-affected> (Affected firmware not present, introduced in bluez-firmware/1.2-6)
[buster] - bluez-firmware <not-affected> (Affected firmware not present, introduced in bluez-firmware/1.2-6)

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