CVE-2026-22264Network attack vectorHinoki check available

Memory corruption via overflowing alert queue capacity

Published Jan 27, 2026 · Updated Jan 27, 2026

Use-after-free in Suricata before 7.0.14 and 8.0.0 through 8.0.2 allows remote attackers to corrupt memory via one packet. AlertQueueExpand in src/detect-engine-alert.c doubles the 16-bit alert_queue_capacity without a boundary check, so the value wraps while queue storage is reallocated. Exploitation requires a ruleset with at least 65,536 signatures matching that packet and can crash the engine or corrupt its process memory.

CVSS severity7.4
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in Suricata before 7.0.14 and 8.0.0 through 8.0.2 allows remote attackers to corrupt memory via one packet. AlertQueueExpand in src/detect-engine-alert.c doubles the 16-bit alert_queue_capacity without a boundary check, so the value wraps while queue storage is reallocated. Exploitation requires a ruleset with at least 65,536 signatures matching that packet and can crash the engine or corrupt its process memory.

The record

CVE
CVE-2026-22264
Published
Jan 27, 2026
Updated
Jan 27, 2026
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-416, T1562.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 2026Record 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=< 7.0.14
  2. Affected versionversion=>= 8.0.0, < 8.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=< 7.0.14; version=>= 8.0.0, < 8.0.3

Published CVSS scores

9.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
7.4GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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-416Use After Free
T1562.001Impair Defenses: Disable or Modify Tools

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo