Description (CNA)
A BIND resolver encountering an SVCB/HTTPS AliasMode record referencing 14 or more SVCB/HTTPS ServiceMode records may fail to properly deallocate internal resources. If this happens repeatedly, resource exhaustion will eventually prevent the resolver from performing new recursive lookups. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| ISC / BIND 9 | affected 9.18.0 through 9.18.50; affected 9.20.0 through 9.20.27; affected 9.21.0 through 9.21.25; affected 9.18.11-S1 through 9.18.50-S1; affected 9.20.9-S1 through 9.20.27-S1 |
CWE
CWE-401
References
- https://kb.isc.org/docs/cve-2026-81563
- https://downloads.isc.org/isc/bind9/9.20.29
- https://downloads.isc.org/isc/bind9/9.21.26
ADP enrichment
No English description supplied.
No references supplied.