Bug 2534102 (CVE-2026-19774)

Summary: CVE-2026-19774 bluez: BlueZ: Arbitrary Code Execution via A2DP Stack-based Buffer Overflow
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in BlueZ. This vulnerability, a stack-based buffer overflow in the Advanced Audio Distribution Profile (A2DP) stack, allows a network-adjacent attacker to execute arbitrary code. By pairing a malicious Bluetooth device with the target system, an attacker can exploit improper validation of user-supplied data length. Successful exploitation leads to arbitrary code execution with root privileges.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2535010    
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Description OSIDB Bzimport 2026-09-15 18:43:12 UTC 
BlueZ A2DP Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of BlueZ. An attacker must first obtain the ability to pair a malicious Bluetooth device with the target system in order to exploit this vulnerability.

The specific flaw exists within the handling of the stream endpoints. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-29429.