CVE-2026-1678
dns_unpack_name() caches the buffer tailroom once and reuses it while appending DNS labels.
Published Mar 5, 2026 · updated Jun 17, 2026 · zephyrproject zephyr
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.
Code
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Timeline
Detection, updates, and resolution for this record.
Mar 5, 2026 · NIST NVD
Detected
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.
Jun 17, 2026 · NIST NVD
Updated
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.
Affected
- cpe zephyrproject/zephyrversion unspecified
Sources
- NIST NVDVulnerability recordCVE-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 trigg
nvd.nist.gov