CVE-2025-59148Network attack vector

Remote engine crash via unanchored entropy rule

Published Oct 1, 2025 · Updated Oct 1, 2025

NULL pointer dereference in Suricata 8.0.0 allows remote attackers to crash the engine through traffic matching an unanchored entropy rule. DetectEntropyDoMatch stores the computed value with FlowVarAddFloat through det_ctx->p->flow without checking that a flow exists for an unanchored content buffer. Exploitation requires an enabled local rule with an unanchored entropy keyword and matching network traffic, and a successful trigger terminates packet inspection.

CVSS severity7.5
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Suricata 8.0.0 allows remote attackers to crash the engine through traffic matching an unanchored entropy rule. DetectEntropyDoMatch stores the computed value with FlowVarAddFloat through det_ctx->p->flow without checking that a flow exists for an unanchored content buffer. Exploitation requires an enabled local rule with an unanchored entropy keyword and matching network traffic, and a successful trigger terminates packet inspection.

The record

CVE
CVE-2025-59148
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 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=< 8.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=< 8.0.1

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.

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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-476NULL Pointer Dereference
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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