Stack-based buffer overflow in BlueZ - CVE-2026-19774

Vulnerability identifier: #VU146027

CSH Severity: Medium

CVSS v4: 7.3 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-19774

CWE-ID: CWE-121

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the handling of the stream endpoints. A remote attacker on the local network can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

BlueZ
Anolis OS
Fedora
bluez
bluez-cups
bluez-hid2hci
bluez-libs
bluez-libs-devel
bluez-mesh
bluez-obexd
bluez-doc

Install updates from vendor's website.

bluez - update to 5.82-2
bluez-cups - update to 5.82-2
bluez-hid2hci - update to 5.82-2
bluez-libs - update to 5.82-2
bluez-libs-devel - update to 5.82-2
bluez-mesh - update to 5.82-2
bluez-obexd - update to 5.82-2
bluez-doc - update to 5.82-2
bluez - addressed in versions 5.87+1.git789f6e154-2.fc43, 5.87+1.git789f6e154-2.fc44, 5.87+1.git789f6e154-2.fc45

• https://www.zerodayinitiative.com/advisories/ZDI-26-589/

• Stack-based buffer overflow in BlueZ
• Fedora 45 update for bluez
• Fedora 44 update for bluez
• Fedora 43 update for bluez
• Anolis OS update for bluez