CVE-2026-75084— TI CC1200 IEEE 802.15.4驱动程序越界写入漏洞
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。
以下是对该漏洞描述信息的中文翻译： CC1200 子 GHz IEEE 802.15.4 驱动程序在 函数中从无线电接收 FIFO（先进先出缓冲区）的第一个字节获取 PHY 数据包长度，并在 函数中对其进行验证（位于 ）。该验证仅强制执行了下界检查（即 ）；其第二个子句拒绝了包含字节数多于声明值的 FIFO，因此从未对较大值设定上界。由于驱动程序将无线电配置为可变数据包长度模式，且 设置为 ，因此长度字节是一个空中传输（over-the-air）的值 0-255，它会传递给 以及后续的 SPI 突发读取操作，且未受
影响版本矩阵 1
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| zephyrproject | zephyr | 1.11.0≤ 4.4.2 |
affected |
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一、 漏洞 CVE-2026-75084 基础信息
漏洞信息
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Vulnerability Title
Out-of-bounds write in the TI CC1200 IEEE 802.15.4 driver from an unvalidated radio-supplied packet length
来源: CVE Program / CVE List V5
Vulnerability Description
The CC1200 sub-GHz IEEE 802.15.4 driver takes the PHY packet length from the first byte of the radio's RX FIFO in get_packet_length() and validates it in verify_rxfifo_validity() (drivers/ieee802154/ieee802154_cc1200.c). That validation only enforced a lower bound (pkt_len < 3); its second clause rejects a FIFO that holds more bytes than declared and therefore never bounds large values. Because the driver configures the radio for variable packet length with PKT_LEN = 0xFF, the length byte is an over-the-air value of 0-255 that reached net_pkt_rx_alloc_with_buffer() and the subsequent SPI burst read unclamped.
An unauthenticated attacker within radio range can transmit a frame that presents a length byte above the IEEE 802.15.4 maximum of 127 while the chip's 128-byte RX FIFO has not overflowed, so the driver's RX_FIFO_ERROR pre-check does not fire. Reaching this state depends on RF framing and timing, since the RX thread is driven off the PKT_SYNC_RXTX signal and may sample the FIFO before a packet is complete; no pairing, authentication, or user interaction is required.
With the default CONFIG_NET_BUF_FIXED_DATA_SIZE and CONFIG_NET_BUF_DATA_SIZE=128, an allocation larger than one fragment is satisfied by a chain of fragments, but read_rxfifo_content() performs a single SPI burst of pkt_len bytes into the first fragment's buf->data and then calls net_buf_add() with the same length. A length above 128 therefore writes up to 127 bytes past the end of a fragment in the contiguous rx_bufs pool and leaves a net_buf whose len exceeds its capacity. The overflowing bytes are FIFO-underflow output rather than attacker-chosen data, so the practical impact is network-buffer-pool corruption and crashes rather than a controlled write. Only builds that enable CONFIG_IEEE802154_CC1200 with an attached CC1200 radio are affected.
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:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| zephyrproject | zephyr | 1.11.0 ~ 4.4.2 | - |
|
二、漏洞 CVE-2026-75084 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-75084 补丁与修复 (1)
CVE-2026-75084 其他参考 (1)
同批安全公告 · zephyrproject · 2026-10-14 · 共 4 条
| CVE-2026-19673 | 7.1 HIGH | Zephyr Ethernet L2 解析截断 VLAN 头时越界读取及缓冲区下溢漏洞 |
| CVE-2026-75083 | 5.9 MEDIUM | NXP KW41Z IEEE 802.15.4驱动整型下溢出越界写漏洞 |
| CVE-2026-75085 | 4.2 MEDIUM | STM32WBA IEEE 802.15.4 驱动越界读取漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-75084
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