CVE-2025-7054Network attack vector

Service hang via cross-path connection-ID retirement

Published Aug 7, 2025 · Updated Aug 7, 2025

Infinite-loop denial of service in Cloudflare quiche 0.15.0 through 0.24.4 allows remote attackers to hang QUIC processing. The packet-generation path processes cross-path connection-ID retirements while enforcing that a packet cannot retire its own active ID, and full ID synchronization leaves the send loop without an exit. A completed QUIC handshake and crafted retirement frames are required; the loop monopolizes processing and interrupts the embedding service.

CVSS severity8.7
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Infinite-loop denial of service in Cloudflare quiche 0.15.0 through 0.24.4 allows remote attackers to hang QUIC processing. The packet-generation path processes cross-path connection-ID retirements while enforcing that a packet cannot retire its own active ID, and full ID synchronization leaves the send loop without an exit. A completed QUIC handshake and crafted retirement frames are required; the loop monopolizes processing and interrupts the embedding service.

The record

CVE
CVE-2025-7054
Published
Aug 7, 2025
Updated
Aug 7, 2025
Vendor
Cloudflare
Product
quiche
Classifications
CWE-835, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.15.0 <0.24.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cloudflare · quicheversion=0.15.0 <0.24.5

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
8.7CloudflareCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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