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CVE-2026-40211

Denial of service via crafted DoH3 queries PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
PowerDNS / DNSdistaffected 1.9.0 before 1.9.15; affected 2.0.0 before 2.0.7

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.