CVE-2026-40211: falha de média gravidade em PowerDNS DNSdist
Denial of service via crafted DoH3 queries
Publicada em
13Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 5.3epss 0.7%
probabilidade de exploração
0.7%top 48% das CVEs
exploração observada
nãonenhuma fonte reporta
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Produtos afetados
PowerDNS · DNSdistCVEs relacionadas — PowerDNS DNSdist
No mesmo produto, das mais perigosas para as menos.
CVE-2026-33598MEDIUMOut-of-bounds read in cache inspection via LuaEPSS 2.8%CVE-2025-30194HIGHDenial of service via crafted DoH exchangeEPSS 2.3%CVE-2026-27853MEDIUMOut-of-bounds write when rewriting large DNS packetsEPSS 1.5%CVE-2026-27854MEDIUMUse after free when parsing EDNS options in LuaEPSS 1.3%CVE-2026-33602MEDIUMOff-by-one access when processing crafted UDP responsesEPSS 1.2%CVE-2024-25581HIGHTransfer requests received over DoH can lead to a denial of service in DNSdistEPSS 1.1%