CVE-2026-45751Network attack vector

Network-inspection interruption via stale transform pointer

Published Sep 10, 2026 · Updated Sep 10, 2026

Use-after-free in Suricata before 7.0.16 and 8.0.0 through 8.0.4 allows remote attackers to interrupt network inspection via traffic. The inspection-buffer helper retains a pointer into freed storage when an earlier chained transform reallocates the backing buffer before dotprefix runs. Reachability requires a specific but non-malicious rule that chains dotprefix after another transform, so affected sensors expose availability rather than data access or modification.

CVSS severity5.9
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Suricata before 7.0.16 and 8.0.0 through 8.0.4 allows remote attackers to interrupt network inspection via traffic. The inspection-buffer helper retains a pointer into freed storage when an earlier chained transform reallocates the backing buffer before dotprefix runs. Reachability requires a specific but non-malicious rule that chains dotprefix after another transform, so affected sensors expose availability rather than data access or modification.

The record

CVE
CVE-2026-45751
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record 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=< 7.0.16
  2. Affected versionversion=>= 8.0.0, < 8.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=< 7.0.16; version=>= 8.0.0, < 8.0.5

Published CVSS scores

5.9GitHubCVSS:3.1/AV:N/AC:H/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 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-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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