CVE-2026-1678

dnsunpackname 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 wri...

CVE-2026-1678: Out-of-bounds Write

dnsunpackname 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 wri...