CVE-2018-5734: ISC BIND

High severity, CVSS 7.5. EPSS: 6.3% chance of exploitation in the next 30 days.

While handling a particular type of malformed packet BIND erroneously selects a SERVFAIL rcode instead of a FORMERR rcode. If the receiving view has the SERVFAIL cache feature enabled, this can trigger an assertion failure in badcache.c when the request doesn't contain all of the expected information. Affects BIND 9.10.5-S1 to 9.10.5-S4, 9.10.6-S1, 9.10.6-S2.

Affected products

• ISC BIND: version 9.10.5 only; version 9.10.6 only
• Netapp Data Ontap Edge: affected versions not specified
• Netapp Solidfire Element OS Management Node: affected versions not specified

Published 2019-01-16. Last modified 2026-06-17.