CyberRota Analysis
This is a high severity vulnerability with a CVSS score of 8.8. See the original NVD description below for full technical details.
CVE
CVE-2026-12244
Severity
HIGH
CVSS
8.8
EPSS
0.33%
Original NVD Description
If NSD is configured as secondary for a zone, the primary of that zone can crash NSD with an AXFR containing a DNS message with a special crafted SVCB RR with an rdata size of 65512, that let's an (uint16_t) variable that is used to allocate space needed for the RR wrap (because total size > 65535), causing a heap overflow. The attacker can perform a controlled (RCE class) head write of up to 65509 bytes
Related CVEs
Other vulnerabilities affecting the same vendor(s)