CVE-2026-11894— zephyrproject zephyr 资源管理错误漏洞
一分钟漏洞结论
影响对象
zephyrproject zephyr
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
zephyrproject zephyr是zephyrproject组织开源的一个面向物联网设备的实时操作系统。 zephyrproject zephyr 4.4.0至4.4.2之前版本存在资源管理错误漏洞，该漏洞源于Realtek BEE蓝牙HCI驱动在错误路径上未遵守缓冲区所有权契约，错误释放缓冲区，导致双重释放和释放后重用，可能造成设备崩溃或内存破坏。
影响版本矩阵 1
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| zephyrproject | zephyr | 4.4.0< 4.4.2 |
affected |
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一、 漏洞 CVE-2026-11894 基础信息
漏洞信息
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Vulnerability Title
Double-free / use-after-free in Realtek BEE Bluetooth HCI driver `send()` error paths
来源: CVE Program / CVE List V5
Vulnerability Description
The Realtek BEE Bluetooth HCI driver's send callback, bt_hci_bee_send() in drivers/bluetooth/hci/hci_bee.c, violated the bt_hci_driver_api buffer-ownership contract. That contract requires the driver to consume (unref) the transmit net_buf 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 net_buf_unref(buf) before returning the error code.
Because the host TX paths (in subsys/bluetooth/host/hci_core.c) unref the buffer again after send() returns an error, the buffer is freed twice: the driver returns it to its net_buf 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 LOG_ERR 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 net_buf 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.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
双重释放
来源: CVE Program / CVE List V5
Vulnerability Title
zephyrproject zephyr 资源管理错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
zephyrproject zephyr是zephyrproject组织开源的一个面向物联网设备的实时操作系统。 zephyrproject zephyr 4.4.0至4.4.2之前版本存在资源管理错误漏洞，该漏洞源于Realtek BEE蓝牙HCI驱动在错误路径上未遵守缓冲区所有权契约，错误释放缓冲区，导致双重释放和释放后重用，可能造成设备崩溃或内存破坏。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| zephyrproject | zephyr | 4.4.0 ~ 4.4.2 | - |
|
二、漏洞 CVE-2026-11894 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-11894 补丁与修复 (2)
同批安全公告 · zephyrproject · 2026-08-11 · 共 5 条
| CVE-2026-11893 | 5.9 MEDIUM | zephyrproject zephyr 资源管理错误漏洞 |
| CVE-2026-12052 | 5.2 MEDIUM | zephyrproject zephyr 缓冲区错误漏洞 |
| CVE-2026-12051 | 4.6 MEDIUM | zephyrproject zephyr 异常处理不当漏洞 |
| CVE-2026-11985 | 3.6 LOW | zephyrproject zephyr 信息泄露漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-11894
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