CVE-2026-80186

Name	CVE-2026-80186
Description	A stack-based buffer overflow vulnerability exists in BlueZ, the Linux Bluetooth protocol stack. A remote user within Bluetooth radio range can send a specially crafted Extended Inquiry Response (EIR) packet that causes a buffer overflow when the target device performs Bluetooth discovery. This vulnerability can lead to a Denial of Service (DoS) by crashing the bluetoothd service and may allow for arbitrary code execution.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
bluez (PTS)	bullseye	5.55-3.1+deb11u1	vulnerable
	bullseye (security)	5.55-3.1+deb11u2	vulnerable
	bookworm	5.66-1+deb12u2	vulnerable
	bookworm (security)	5.66-1+deb12u1	vulnerable
	trixie	5.82-1.1	vulnerable
	forky	5.87-1	vulnerable
	sid	5.87-2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
bluez	source	(unstable)	(unfixed)

Notes

https://github.com/bluez/bluez/security/advisories/GHSA-68h6-5qgp-3975
Fixed by: https://github.com/bluez/bluez/commit/381b5d0d208972586282116d333865ba93b8dec2