CVE & CISA-KEV Catalog

CVE-2025-8671

HIGHEPSS 88th pctl
7.5
CVSS v3
NVD

Description

A mismatch caused by client-triggered server-sent stream resets between HTTP/2 specifications and the internal architectures of some HTTP/2 implementations may result in excessive server resource consumption leading to denial-of-service (DoS). By opening streams and then rapidly triggering the server to reset them—using malformed frames or flow control errors—an attacker can exploit incorrect stream accounting. Streams reset by the server are considered closed at the protocol level, even though backend processing continues. This allows a client to cause the server to handle an unbounded number of concurrent streams on a single connection. This CVE will be updated as affected product details are released.

How to fix

Remediation Available
dnsdistUbuntu
Fixed in:1.6.1-1ubuntu0.1~esm2USN-8037-1
Fixed in:1.8.3-2ubuntu0.1~esm1USN-8037-1
Fixed in:1.9.10-1ubuntu0.1USN-8037-1

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

3.51%probability of exploitation in 30 days
88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Related Vulnerabilities

Other CWE-404 vulnerabilities, ordered by exploit likelihood. View all

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CVE-2018-8639High7.822%KEV + Ransom-
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.