CVE-2026-10652 Out-of-bounds read in Zephyr DNS resolver TXT/SRV record parsing (unvalidated `rdlength`)

Zephyr's DNS resolver subsys/net/lib/dns parses resource records from DNS responses in dnsunpackanswer, which validated only the fixed RR header type, class, TTL, rdlength and accepted any attacker-declared rdlength, including one extending past the end of the received datagram. The TXT and SRV...

CVE-2026-10652

Zephyr’s DNS resolver (subsys/net/lib/dns) is vulnerable to an out-of-bounds read in TXT/SRV records due to unvalidated rdlength in dns_unpack_answer(). The resolver accepts attacker-declared rdlength that may extend past the datagram end, and dns_validate_record() copies up to rdlength bytes fro...