An attacker can send crafted DNS over HTTP/3 queries, triggering an exception that prevents some buffer from being freed right away. The buffer will be freed at the end of the QUIC connection, but on some setups it might be possible to open enough concurrent DoH3 streams to trigger an out-of-memory condition, resulting in a denial of service.
Metrics
Affected Vendors & Products
References
History
Fri, 26 Jun 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Powerdns
Powerdns dnsdist |
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| Vendors & Products |
Powerdns
Powerdns dnsdist |
Thu, 25 Jun 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-770 | |
| Metrics |
ssvc
|
Thu, 25 Jun 2026 13:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | An attacker can send crafted DNS over HTTP/3 queries, triggering an exception that prevents some buffer from being freed right away. The buffer will be freed at the end of the QUIC connection, but on some setups it might be possible to open enough concurrent DoH3 streams to trigger an out-of-memory condition, resulting in a denial of service. | |
| Title | Denial of service via crafted DoH3 queries | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: OX
Published: 2026-06-25T12:23:55.585Z
Updated: 2026-06-25T13:45:02.430Z
Reserved: 2026-04-10T07:11:39.060Z
Link: CVE-2026-40211
Updated: 2026-06-25T13:44:49.368Z
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