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CVE-2026-22264

Suricata detect/alert: heap-use-after-free on alert queue expansion

Published: Jan 27, 2026Updated: Jan 29, 2026 Sources: CVE List NVD BDUCWE-416
NVD MITRE
7.4CVSSHIGH
EPSS Score
0.3%
Top 74.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Suricata is a network IDS, IPS and NSM engine. Prior to version 8.0.3 and 7.0.14, an unsigned integer overflow can lead to a heap use-after-free condition when generating excessive amounts of alerts for a single packet. Versions 8.0.3 and 7.0.14 contain a patch. As a workaround, do not run untrusted rulesets or run with less than 65536 signatures that can match on the same packet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:NI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-416

Affected Products

suricataOISF
On-premNetwork Device
Networking Infrastructure / firewall
SuricataOpen Information Security Foundation
On-prem
Security Products / vuln-mgmt-scanner
Межсетевой экран "Ideco UTM"ООО "Айдеко Софтвер"
On-prem
Networking Infrastructure / firewall
suricataoisf
On-premNetwork Device
Networking Infrastructure / firewall
oisfoss-projectNetworking Infrastructureaka suricata, libhtp, suricata-update
open information security foundationoss-projectSecurity Productsaka ofis, suricata, libhtp
ооо "айдеко софтвер"commercialRUNetworking Infrastructureaka aidco software, айде́ко софтвер

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://github.com/OISF/suricata/security/advisories/GHSA-mqr8-m3m4-2hw5
github.com
https://github.com/OISF/suricata/commit/549d7bf60616de8e54686a188196453b5b22f715
github.com
https://github.com/OISF/suricata/commit/5789a3d3760dbf33d93fc56c27bd9529e5bdc8f2
github.com
and 3 more references View all →

Timeline

Published
Jan 27, 2026
Last Updated
Jan 29, 2026

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