Vulnerability Details CVE-2026-1678
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 11.1%
CVSS Severity
CVSS v3 Score 9.4
References
Products affected by CVE-2026-1678
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cpe:2.3:o:zephyrproject:zephyr:-
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cpe:2.3:o:zephyrproject:zephyr:1.0.0
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cpe:2.3:o:zephyrproject:zephyr:1.1.0
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cpe:2.3:o:zephyrproject:zephyr:1.10.0
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cpe:2.3:o:zephyrproject:zephyr:1.11.0
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cpe:2.3:o:zephyrproject:zephyr:1.12.0
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cpe:2.3:o:zephyrproject:zephyr:1.13.0
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cpe:2.3:o:zephyrproject:zephyr:1.14.0
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cpe:2.3:o:zephyrproject:zephyr:1.14.1
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cpe:2.3:o:zephyrproject:zephyr:1.14.2
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cpe:2.3:o:zephyrproject:zephyr:1.14.3
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cpe:2.3:o:zephyrproject:zephyr:1.2.0
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cpe:2.3:o:zephyrproject:zephyr:1.3.0
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cpe:2.3:o:zephyrproject:zephyr:1.4.0
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cpe:2.3:o:zephyrproject:zephyr:1.5.0
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cpe:2.3:o:zephyrproject:zephyr:1.6.0
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cpe:2.3:o:zephyrproject:zephyr:1.6.1
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cpe:2.3:o:zephyrproject:zephyr:1.6.99
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cpe:2.3:o:zephyrproject:zephyr:1.7.0
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cpe:2.3:o:zephyrproject:zephyr:1.7.1
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cpe:2.3:o:zephyrproject:zephyr:1.7.99
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cpe:2.3:o:zephyrproject:zephyr:1.8.0
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cpe:2.3:o:zephyrproject:zephyr:1.8.99
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cpe:2.3:o:zephyrproject:zephyr:1.9.0
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cpe:2.3:o:zephyrproject:zephyr:1.9.1
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cpe:2.3:o:zephyrproject:zephyr:1.9.2
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cpe:2.3:o:zephyrproject:zephyr:2.0.0
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cpe:2.3:o:zephyrproject:zephyr:2.1.0
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cpe:2.3:o:zephyrproject:zephyr:2.2.0
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cpe:2.3:o:zephyrproject:zephyr:2.3.0
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cpe:2.3:o:zephyrproject:zephyr:2.4.0
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cpe:2.3:o:zephyrproject:zephyr:2.5.0
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cpe:2.3:o:zephyrproject:zephyr:2.5.1
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cpe:2.3:o:zephyrproject:zephyr:2.6.0
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cpe:2.3:o:zephyrproject:zephyr:2.6.1
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cpe:2.3:o:zephyrproject:zephyr:2.79.0
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cpe:2.3:o:zephyrproject:zephyr:2.8.0
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cpe:2.3:o:zephyrproject:zephyr:2.81.0
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cpe:2.3:o:zephyrproject:zephyr:2.82.0
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cpe:2.3:o:zephyrproject:zephyr:2.83.0
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cpe:2.3:o:zephyrproject:zephyr:2.84.0
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cpe:2.3:o:zephyrproject:zephyr:2.85.0
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cpe:2.3:o:zephyrproject:zephyr:2.86.0
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cpe:2.3:o:zephyrproject:zephyr:2.87.0
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cpe:2.3:o:zephyrproject:zephyr:2.88.0
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cpe:2.3:o:zephyrproject:zephyr:2.89.0
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cpe:2.3:o:zephyrproject:zephyr:2.90.0
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cpe:2.3:o:zephyrproject:zephyr:2.91.0
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cpe:2.3:o:zephyrproject:zephyr:2.92.0
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cpe:2.3:o:zephyrproject:zephyr:2.93.0
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cpe:2.3:o:zephyrproject:zephyr:2.94.0
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cpe:2.3:o:zephyrproject:zephyr:2.95.0
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cpe:2.3:o:zephyrproject:zephyr:3.0.0
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cpe:2.3:o:zephyrproject:zephyr:3.0.1
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cpe:2.3:o:zephyrproject:zephyr:3.1.0
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cpe:2.3:o:zephyrproject:zephyr:3.2.0
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cpe:2.3:o:zephyrproject:zephyr:3.2.01
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cpe:2.3:o:zephyrproject:zephyr:3.2.1
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cpe:2.3:o:zephyrproject:zephyr:3.2.31
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cpe:2.3:o:zephyrproject:zephyr:3.2.40
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cpe:2.3:o:zephyrproject:zephyr:3.2.41
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cpe:2.3:o:zephyrproject:zephyr:3.4.0
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cpe:2.3:o:zephyrproject:zephyr:3.5.0
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cpe:2.3:o:zephyrproject:zephyr:3.6.0
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cpe:2.3:o:zephyrproject:zephyr:3.7.0
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cpe:2.3:o:zephyrproject:zephyr:3.7.1
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cpe:2.3:o:zephyrproject:zephyr:4.0.0