CVE-2025-53538Network attack vector

Visibility loss via stream-zero file-state retention

Published Jul 22, 2025 · Updated Jul 23, 2025

Resource exhaustion in Suricata before 7.0.11 and 8.0.0-beta1 through 8.0.0-rc1 allows remote attackers to disrupt monitoring. The HTTP/2 parser marks the global stream-zero transaction as able to hold files; DATA frames then open file state that completed transactions never close. No authentication or user interaction is required, and sustained crafted traffic grows memory until network-monitoring visibility is lost.

CVSS severity7.5
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Suricata before 7.0.11 and 8.0.0-beta1 through 8.0.0-rc1 allows remote attackers to disrupt monitoring. The HTTP/2 parser marks the global stream-zero transaction as able to hold files; DATA frames then open file state that completed transactions never close. No authentication or user interaction is required, and sustained crafted traffic grows memory until network-monitoring visibility is lost.

The record

CVE
CVE-2025-53538
Published
Jul 22, 2025
Updated
Jul 23, 2025
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-770, CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 7.0.11
  2. Affected versionversion=>= 8.0.0-beta1, < 8.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=< 7.0.11; version=>= 8.0.0-beta1, < 8.0.0

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CWE-400Uncontrolled Resource Consumption
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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