Description (CNA)
A use-after-free vulnerability exists within the DNS-over-HTTPS implementation. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| ISC / BIND 9 | affected 9.20.0 through 9.20.22; affected 9.21.0 through 9.21.21; affected 9.20.9-S1 through 9.20.22-S1; unaffected 9.18.0 through 9.18.48; unaffected 9.18.11-S1 through 9.18.48-S1 |
CWE
CWE-416
References
- https://kb.isc.org/docs/cve-2026-3593
- https://downloads.isc.org/isc/bind9/9.20.23
- https://downloads.isc.org/isc/bind9/9.21.22
ADP enrichment
No English description supplied.
No references supplied.
A flaw was found in the BIND (Berkeley Internet Name Domain) DNS-over-HTTPS implementation. A remote attacker could send specially crafted HTTP/2 traffic to a DNS-over-HTTPS endpoint, leading to a use-after-free vulnerability. This could trigger memory corruption, potentially allowing the attacker to cause a denial of service or, in some cases, execute arbitrary code.