CVE-2025-301947.5HighCWE-416

CVE-2025-30194: Denial of service via crafted DoH exchange

PowerDNS · DNSdist

Vendor fix available · Affected: PowerDNS DNSdist · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

2.3%probability of exploitation in the next 30 days

83rd percentile

050100

Higher than 83% of scored CVEs

7.5HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.9 version. A workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version. We would like to thank Charles Howes for bringing this issue to our attention.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

PowerDNS · DNSdistfrom 1.9.0 before 1.9.9

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Use After Free · Memory Corruption
Vendor: PowerDNS
Published: April 2025
Band: Possible (1 to 10%), April 2025

CoverageNo articles yet

No CyberSIXT article names CVE-2025-30194 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.