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CVE-2026-10673— Out-of-bounds write in ADIN2111/ADIN1110 OA SPI Ethernet RX frame reassembly

Quick assessment

Affected
zephyrproject zephyr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

zephyrproject zephyr是zephyrproject组织开源的一款实时操作系统内核。 zephyrproject zephyr 3.7.0版本至4.4.0版本存在缓冲区错误漏洞，该漏洞源于ADIN2111/ADIN1110以太网驱动程序在OPEN Alliance SPI模式下重新组装接收的以太网帧时，未检查写入光标位置与数据长度是否超出缓冲区边界，可能导致远程或邻近攻击者发送超长帧，造成驱动程序RX卸载线程将受控数据写入静态缓冲区之外的相邻驱动/内核内存，导致内存破坏、拒绝服务或潜在代码

CVSS 8.3 · High EPSS 0.42% · P34

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
zephyrproject zephyr 3.7.0< 4.5.0 affected
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I. Basic Information for CVE-2026-10673

Vulnerability Information
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Vulnerability Title
Out-of-bounds write in ADIN2111/ADIN1110 OA SPI Ethernet RX frame reassembly
Source: CVE Program / CVE List V5
Vulnerability Description
The Zephyr ADIN2111/ADIN1110 10BASE-T1S/T1L Ethernet driver (drivers/ethernet/eth_adin2111.c) reassembles received Ethernet frames in OPEN Alliance (OA) SPI mode by copying device-supplied 64-byte data chunks into a fixed static buffer ctx->buf of size CONFIG_ETH_ADIN2111_BUFFER_SIZE (default 1524 bytes). In eth_adin2111_oa_data_read(), each valid chunk was memcpy'd into ctx->buf[ctx->scur] and the write cursor scur advanced, with no check that scur + len stayed within the buffer. The number of chunks (up to 255, from the BUFSTS RCA field) and the per-chunk length are taken entirely from the frame data received off the wire; the cursor is only reset on a start-of-frame chunk. An attacker on the single-pair Ethernet segment can therefore send a frame whose reassembled size exceeds the configured buffer, causing the driver's RX offload thread to write attacker-controlled frame bytes past the end of the static buffer into adjacent driver/kernel memory (up to roughly 14.8 KB in the worst case). This is a remotely/adjacently reachable out-of-bounds write (CWE-787) that can corrupt memory and cause denial of service or potentially code execution. The defect was introduced when OA SPI support was added (commit 0ca8b0756b1) and shipped in releases v3.7.0 through v4.4.0. The fix adds a bounds check that drops the oversized frame and resets the cursor before the copy.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
zephyrproject zephyr 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
zephyrproject zephyr是zephyrproject组织开源的一款实时操作系统内核。 zephyrproject zephyr 3.7.0版本至4.4.0版本存在缓冲区错误漏洞，该漏洞源于ADIN2111/ADIN1110以太网驱动程序在OPEN Alliance SPI模式下重新组装接收的以太网帧时，未检查写入光标位置与数据长度是否超出缓冲区边界，可能导致远程或邻近攻击者发送超长帧，造成驱动程序RX卸载线程将受控数据写入静态缓冲区之外的相邻驱动/内核内存，导致内存破坏、拒绝服务或潜在代码
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
zephyrproject zephyr 3.7.0 ~ 4.5.0 -

II. Public POCs for CVE-2026-10673

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III. Intelligence Information for CVE-2026-10673

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Patches & Fixes for CVE-2026-10673 (2)

Vendor Advisories for CVE-2026-10673 (1)

IV. Related Vulnerabilities

Same product: zephyr
Same vendor: zephyrproject
Same weakness: CWE-787

V. Comments for CVE-2026-10673

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