CVE-2026-1678— Zephyr 安全漏洞

dns: memory‑safety issue in the DNS name parser

dns_unpack_name() caches the buffer tailroom once and reuses it while appending DNS labels. As the buffer grows, the cached size becomes incorrect, and the final null terminator can be written past the buffer. With assertions disabled (default), a malicious DNS response can trigger an out-of-bounds write when CONFIG_DNS_RESOLVER is enabled.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

跨界内存写

Zephyr 安全漏洞

Zephyr是Zephyr开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr 4.3.0版本及之前版本存在安全漏洞，该漏洞源于dns_unpack_name函数缓存缓冲区尾空间不当，可能导致启用CONFIG_DNS_RESOLVER时发生越界写入。

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