Vulnerability · Published Sep 10, 2026 · Assigned by GitHub_M

CVE-2026-45765Suricata dnp3: unbounded reassembly can lead to resource exhaustion

High 7.5

In plain English

A high-severity uncontrolled resource consumption in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.6%top 50.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, DNP3 reassembly could buffer data without sufficient parser-level bounds. Crafted DNP3 traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable DNP3 (which is not enabled by default) if it is not needed, and/or define a limited `stream.reassembly.depth` (0 or absent is unlimited).

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:13	suricata	no fix listed	DEBIAN-CVE-2026-45765
Debian:14	suricata	1:8.0.5-1	DEBIAN-CVE-2026-45765
Ubuntu:22.04:LTS	suricata	no fix listed	UBUNTU-CVE-2026-45765
Ubuntu:24.04:LTS	suricata	no fix listed	UBUNTU-CVE-2026-45765
Ubuntu:26.04:LTS	suricata	no fix listed	UBUNTU-CVE-2026-45765

Affected products (as reported)

Vendor	Product	Versions
OISF	suricata	>= 8.0.0, < 8.0.5< 7.0.16

Weakness: CWE-400, CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/OISF/suricata/security/advisories/GHSA-m8x4-c78g-r4vj x_refsource_CONFIRM
https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 x_refsource_MISC
https://redmine.openinfosecfoundation.org/issues/8460 x_refsource_MISC