๐Ÿ›ก๏ธ CVE-2026-1678
๐Ÿ”ด CVSS 9.4 โ€” Critical โš ๏ธ Exploit Public CWE-787 NVD
9.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity CRITICAL
CVSS Score 9.4
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
CWE CWE-787
Public Exploit โš ๏ธ Yes
Source NVD
Published 2026-03-05
Updated 2026-06-02
Modified 2026-03-09

Affected Packages

Software From version Fixed in
zephyr โ€” 4.3.0

Similar Threats

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