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CVE-2026-75085— Out-of-bounds read from received-frame length underflow in the STM32WBA IEEE 802.15.4 driver

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。

The STM32WBA IEEE 802.15.4 driver in drivers/ieee802154/ieee802154_stm32wba.c computed the packet length of a received frame as pkt_len = rx_frame->length - IEEE802154_FCS_LENGTH without first checking that the radio-reported length could hold an FCS. pkt_len

CVSS 4.2 · Medium

影响版本矩阵 1

厂商产品 版本范围状态
zephyrproject zephyr 4.3.0≤ 4.4.2 affected
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一、 漏洞 CVE-2026-75085 基础信息

漏洞信息

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Vulnerability Title
Out-of-bounds read from received-frame length underflow in the STM32WBA IEEE 802.15.4 driver
来源: CVE Program / CVE List V5
Vulnerability Description
The STM32WBA IEEE 802.15.4 driver in drivers/ieee802154/ieee802154_stm32wba.c computed the packet length of a received frame as pkt_len = rx_frame->length - IEEE802154_FCS_LENGTH without first checking that the radio-reported length could hold an FCS. pkt_len is a uint8_t, so a reported length of 0 or 1 wrapped to 254 or 255. The only bound on the resulting value was __ASSERT_NO_MSG(pkt_len <= CONFIG_NET_BUF_DATA_SIZE), which compiles to nothing in the default production configuration (CONFIG_ASSERT=n). The length originates in the ST link-layer receive-done metadata (p_metadata->length, stored by stm32wba_802154_receive_done()), and ultimately in the PHY header of a frame received over the air, so it is influenced by any attacker within radio range of the device. Reaching the underflow requires the vendor link layer to surface a frame shorter than the FCS with no error; the driver performed no validation of its own on that value. When the underflow occurs, stm32wba_802154_rx_thread() calls net_pkt_write(pkt, rx_frame->psdu, pkt_len) with a length of about 254 bytes against a receive buffer that holds at most one PHY packet (IEEE802154_MAX_PHY_PACKET_SIZE, 127 bytes). This reads roughly 128 bytes past the end of the radio receive buffer and copies that adjacent memory into a network packet that is submitted to the networking stack, giving an out-of-bounds read with a potential disclosure of adjacent RAM plus needless oversized packet allocation in the RX thread. The fix rejects a frame whose reported length is smaller than IEEE802154_FCS_LENGTH before the subtraction, and replaces the compiled-out assertion with a runtime length check that drops oversized frames — matching the runtime check already present in drivers/ieee802154/ieee802154_nrf5.c.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
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 4.3.0 ~ 4.4.2 -

二、漏洞 CVE-2026-75085 的公开POC

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三、漏洞 CVE-2026-75085 的情报信息

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CVE-2026-75085 补丁与修复 (1)

CVE-2026-75085 其他参考 (1)

同批安全公告 · zephyrproject · 2026-10-14 · 共 4 条

CVE-2026-19673 7.1 HIGH Out-of-bounds read and net_buf length underflow in Zephyr Ethernet L2 when parsing a trunc
CVE-2026-75084 6.8 MEDIUM Out-of-bounds write in the TI CC1200 IEEE 802.15.4 driver from an unvalidated radio-suppli
CVE-2026-75083 5.9 MEDIUM Integer underflow of the radio-reported frame length causes an out-of-bounds write in the

IV. Related Vulnerabilities

Same product: zephyr
Same vendor: zephyrproject
Same weakness: CWE-125

V. Comments for CVE-2026-75085

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