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bluez

A buffer overflow vulnerability exists in the BlueZ A2DP stack that allows network-adjacent attackers to execute arbitrary code with root privileges. Exploitation requires the attacker to pair a malicious Bluetooth device with the target system. The flaw is due to improper validation of user-supplied data length before copying to a fixed-length stack buffer.

CVE-2026-19774 is a stack-based buffer overflow vulnerability in the BlueZ A2DP stack. The vulnerability arises from insufficient validation of the length of user-supplied data when handling stream endpoints, leading to a buffer overflow on the stack. An attacker who can pair a malicious Bluetooth device with the target can exploit this flaw to execute arbitrary code with root privileges. The vulnerability is tracked as CWE-121 and was reported as ZDI-CAN-29429.

Detailed information about BlueZ A2DP Stack-based Buffer Overflow Remote Code Execution Vulnerability. (CVE-2026-19774). Get real-time updates, technical detail

BlueZ A2DP Stack-based Buffer Overflow Remote Code Execution Vulnerability. (CVE-2026-19774) - Live Threat Intelligence - Threat Radar | OffSeq.com

BlueZ A2DP Stack-based Buffer Overflow Remote Code Execution Vulnerability. (CVE-2026-19774)

Bluetooth HID Hosts in BlueZ may permit an unauthenticated Peripheral role HID Device to initiate and establish an encrypted connection, and accept HID keyboard reports, potentially permitting injection of HID messages when no user interaction has occurred in the Central role to authorize such access. An example affected package is bluez 5.64-0ubuntu1 in Ubuntu 22.04LTS. NOTE: in some cases, a CVE-2020-0556 mitigation would have already addressed this Bluetooth HID Hosts issue.

CVE-2023-45866 is a security vulnerability identified in the BlueZ Bluetooth stack, which is the official Linux Bluetooth protocol stack widely used in many Linux distributions, including Ubuntu 22.04 LTS. The vulnerability specifically targets Bluetooth Human Interface Device (HID) Hosts. It allows an unauthenticated peripheral device acting as an HID keyboard to initiate and establish an encrypted Bluetooth connection with the central device (the host) without requiring any user interaction or explicit authorization. Once connected, the malicious peripheral can inject arbitrary HID keyboard reports, effectively simulating keystrokes on the host system. This unauthorized input injection can lead to various attack scenarios, including command execution, privilege escalation, or data exfiltration, depending on the victim system's configuration and security posture. The affected BlueZ version example is 5.64-0ubuntu1, but other versions may also be vulnerable. The vulnerability is notable because it bypasses the normal user consent or authentication mechanisms typically required for Bluetooth HID connections. Some mitigations from a previous vulnerability, CVE-2020-0556, may partially address this issue if already applied. However, the new vulnerability remains a significant risk due to the lack of user interaction requirement and the ability to inject input at the HID level. No public exploits have been reported yet, but the potential impact warrants urgent attention. The vulnerability affects the confidentiality and integrity of affected systems by allowing unauthorized input injection, which can compromise system control and data security.

Detailed information about CVE-2023-45866: n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2023-45866: n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-45866: n/a


BlueZ A2DP Stack-based Buffer Overflow Remote Code Execution Vulnerability. (CVE-2026-19774)CVE-2026-19774 0 A buffer overflow vulnerability exists in the BlueZ A2DP stack that allows network-adjacent attackers to execute arbitrary code with root privileges. Exploitation requires the attacker to pair a malicious Bluetooth device with the target system. The flaw is due to improper validation of user-supplied data length before copying to a fixed-length stack buffer. MediumVulnerability#gcve #osv #ghsa-53cx-rp5p-x795 Join the discussion	GCVE Database	09/15/2026, 19:17:00 UTC Added: 09/16/2026, 03:07:52 UTC
CVE-2023-45866: n/aCVE-2023-45866 0 Bluetooth HID Hosts in BlueZ may permit an unauthenticated Peripheral role HID Device to initiate and establish an encrypted connection, and accept HID keyboard reports, potentially permitting injection of HID messages when no user interaction has occurred in the Central role to authorize such access. An example affected package is bluez 5.64-0ubuntu1 in Ubuntu 22.04LTS. NOTE: in some cases, a CVE-2020-0556 mitigation would have already addressed this Bluetooth HID Hosts issue. UnknownVulnerabilityGermanyFranceNetherlands+5#cve #cve-2023-45866 Join the discussion	CVE Database V5	12/08/2023, 00:00:00 UTC Added: 11/04/2025, 19:34:46 UTC

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