The Realtek BEE Bluetooth HCI driver's send callback, bthcibeesend() in drivers/bluetooth/hci/hcibee.c, violated the bthcidriverapi buffer-ownership contract. That contract requires the driver to consume (unref) the transmit netbuf only on success; on an error return the host caller retains ownership and unrefs the buffer itself. The pre-fix code routed all error paths through a shared cleanup label that unconditionally called netbufunref(buf) before returning the error code.

Because the host TX paths (in subsys/bluetooth/host/hcicore.c) unref the buffer again after send() returns an error, the buffer is freed twice: the driver returns it to its netbuf pool and the host then unrefs the already-freed buffer, corrupting the shared pool / underflowing the reference count (CWE-415). The same error branch additionally dereferenced buf->len inside a LOGERR call after the buffer had already been unref'd, a read of freed memory (CWE-416) that is compiled in at the default error log level.

The failing edges are reached when the controller's host-to-controller buffer allocation fails or the controller send fails (resource-exhaustion / IO conditions). A remote Bluetooth peer can push the device toward these conditions indirectly by driving heavy host transmit activity, at which point the double-free corrupts the host netbuf pool and most likely crashes the device, with residual potential for further memory corruption. The impact is confined to builds using this specific Realtek BEE HCI driver.

The fix returns early from each error path without unreffing and unrefs the buffer only on the success path, restoring the ownership contract and eliminating both the double-free and the use-after-free read.

Realtek Audio Service 1.0.0.55 contains an unquoted service path vulnerability in RtkAudioService64.exe that allows local attackers to escalate privileges by injecting malicious code. Attackers can place executable files in the unquoted service path directory to execute arbitrary code with LocalSystem privileges during service startup or system reboot.

Realtek High Definition Audio Driver 6.0.1.6730 contains an unquoted service path vulnerability that allows local attackers to escalate privileges by placing a malicious executable in the service path. Attackers can insert an executable file in the unquoted path and restart the service to execute code with LocalSystem privileges.

Vulnerability in Realtek RtsPer driver for PCIe Card Reader (RtsPer.sys) before 10.0.22000.21355 and Realtek RtsUer driver for USB Card Reader (RtsUer.sys) before 10.0.22000.31274 allows writing to kernel memory beyond the SystemBuffer of the IRP.

Vulnerability in Realtek RtsPer driver for PCIe Card Reader (RtsPer.sys) before 10.0.22000.21355 and Realtek RtsUer driver for USB Card Reader (RtsUer.sys) before 10.0.22000.31274 allows for the leakage of kernel memory from both the stack and the heap.

Vulnerability in Realtek RtsPer driver for PCIe Card Reader (RtsPer.sys) before 10.0.22000.21355 and Realtek RtsUer driver for USB Card Reader (RtsUer.sys) before 10.0.22000.31274 leaks driver logs that contain addresses of kernel mode objects, weakening KASLR.

Vulnerability in Realtek RtsPer driver for PCIe Card Reader (RtsPer.sys) before 10.0.22000.21355 and Realtek RtsUer driver for USB Card Reader (RtsUer.sys) before 10.0.22000.31274 provides read and write access to the PCI configuration space of the device.

An issue in the Bluetooth Low Energy (BLE) stack of Realtek RTL8762E BLE SDK v1.4.0 allows attackers within Bluetooth range to cause a Denial of Service (DoS) via sending a specific sequence of crafted control packets.

An issue in Realtek RTL8762EKF-EVB RTL8762E SDK v1.4.0 allows attackers to cause a Denial of Service (DoS) via sending a crafted before a pairing public key is received during a Bluetooth connection attempt.

Realtek RTL8762EKF-EVB RTL8762E SDK V1.4.0 was discovered to utilize insufficient permission checks on critical fields within Bluetooth Low Energy (BLE) data packets. This issue allows attackers to cause a Denial of Service (DoS) via a crafted LLLengthReq packet.

The rtl8192cd Wi-Fi kernel driver in the Realtek rtl819x Jungle SDK (all known versions through v3.4.14B) does not perform any access control checks on the writemem (ioctl 0x89F5) and readmem (ioctl 0x89F6) debug handlers, which are compiled into production builds via the unconditionally defined IOCTLDEBUGCMD macro in 8192cdcfg.h

An issue in the Bluetooth Low Energy implementation of Realtek RTL8762E BLE SDK v1.4.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted llterminateind packet.

RealTek Jungle SDK contains multiple memory corruption vulnerabilities which can allow an attacker to perform remote code execution.

Realtek AP-Router SDK HTTP web server boa contains a buffer overflow vulnerability due to unsafe copies of some overly long parameters submitted in the form that lead to denial-of-service (DoS).

Realtek SDK contains an improper input validation vulnerability in the miniigd SOAP service that allows remote attackers to execute malicious code via a crafted NewInternalClient request.

Stack-based buffer overflow in Realtek Media Player (aka Realtek Sound Manager, RtlRack, or rtlrack.exe) 1.15.0.0 allows remote attackers to execute arbitrary code via a crafted playlist (PLA) file.

An issue in the component rtkio64.sys of Realtek Semiconductor Corp Realtek lO Driver v1.008.0823.2017 allows attackers to escalate privileges and execute arbitrary code via sending crafted IOCTL requests.

An issue in the component RTKVHD64.sys of Realtek Semiconductor Corp Realtek(r) High Definition Audio Function Driver v6.0.9549.1 allows attackers to escalate privileges and execute arbitrary code via sending crafted IOCTL requests.

Realtek Andrea RT Filters 1.0.64.7 contains an unquoted service path vulnerability that allows local users to potentially execute arbitrary code with elevated system privileges. Attackers can exploit the unquoted path in 'C:\Program Files\IDT\WDM\AESTSr64.exe' to inject malicious code that would execute during service startup or system reboot.

Realtek IIS Codec Service 6.4.10041.133 contains an unquoted service path vulnerability that allows local attackers to potentially execute arbitrary code. Attackers can exploit the unquoted path in the service configuration to inject malicious executables and escalate privileges on the system.

Realtek Wireless LAN Utility 700.1631 contains an unquoted service path vulnerability that allows local users to potentially execute code with elevated system privileges. Attackers can exploit the unquoted service path by inserting malicious code in the system root path that would execute during application startup or system reboot.

A heap-based buffer overflow vulnerability exists in the configuration file mibinitvaluearray functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted .dat file can lead to arbitrary code execution. An attacker can upload a malicious file to trigger this vulnerability.

Three os command injection vulnerabilities exist in the boa formWsc functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted series of HTTP requests can lead to arbitrary command execution. An attacker can send a series of HTTP requests to trigger these vulnerabilities.This command injection is related to the localPin request's parameter.

Two stack-based buffer overflow vulnerabilities exist in the boa setRadvdInterfaceParam functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted series of network requests can lead to remote code execution. An attacker can send a sequence of requests to trigger these vulnerabilities.This stack-based buffer overflow is related to the AdvDefaultPreference request's parameter.

A stack-based buffer overflow vulnerability exists in the boa getInfo functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted series of HTTP requests can lead to remote code execution. An attacker can send a series of HTTP requests to trigger this vulnerability.

Three os command injection vulnerabilities exist in the boa formWsc functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted series of HTTP requests can lead to arbitrary command execution. An attacker can send a series of HTTP requests to trigger these vulnerabilities.This command injection is related to the targetAPSsid request's parameter.

Two stack-based buffer overflow vulnerabilities exist in the boa formIpQoS functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted series of HTTP requests can lead to remote code execution. An attacker can send a series of HTTP requests to trigger these vulnerabilities.This stack-based buffer overflow is related to the comment request's parameter.

Two stack-based buffer overflow vulnerabilities exist in the boa formIpQoS functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted series of HTTP requests can lead to remote code execution. An attacker can send a series of HTTP requests to trigger these vulnerabilities.This stack-based buffer overflow is related to the entryname request's parameter.

Three os command injection vulnerabilities exist in the boa formWsc functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted series of HTTP requests can lead to arbitrary command execution. An attacker can send a series of HTTP requests to trigger these vulnerabilities.This command injection is related to the peerPin request's parameter.

Two stack-based buffer overflow vulnerabilities exist in the boa setRadvdInterfaceParam functionality of Realtek rtl819x Jungle SDK v3.4.11. A specially crafted series of network requests can lead to remote code execution. An attacker can send a sequence of requests to trigger these vulnerabilities.This stack-based buffer overflow is related to the interfacename request's parameter.