This update for bind fixes the following issues:
- CVE-2021-25214: Fixed a broken inbound incremental zone update (IXFR) which could have caused named to terminate unexpectedly (bsc#1185345).
- CVE-2021-25215: Fixed an assertion check which could have failed while answering queries for DNAME records that required the DNAME to be processed to resolve itself (bsc#1185345).
- make /usr/bin/delv in bind-tools position independent (bsc#1183453).
This update for bind fixes the following issues:
- CVE-2020-8625: A vulnerability in BIND's GSSAPI security policy
negotiation can be targeted by a buffer overflow attack [bsc#1182246]