High severity · published Jan 27, 2026
CVE-2026-22259
Suricata dnp3: unbounded transaction growth
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
Suricata is a network IDS, IPS and NSM engine. Prior to versions 8.0.3 and 7.0.14, specially crafted traffic can cause Suricata to consume large amounts of memory while parsing DNP3 traffic. This can lead to the process slowing down and running out of memory, potentially leading to it getting killed by the OOM killer. Versions 8.0.3 or 7.0.14 contain a patch. As a workaround, disable the DNP3 parser in the suricata yaml (disabled by default).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
suricata · OISF
< 7.0.14; >= 8.0.0, < 8.0.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-22259
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-22259
Patch
https://github.com/OISF/suricata/commit/50cac2e2465ca211eabfa156623e585e9037bb7e
Patch
https://github.com/OISF/suricata/commit/63225d5f8ef64cc65164c0bb1800730842d54942
Patch
https://github.com/OISF/suricata/security/advisories/GHSA-878h-2x6v-84q9
Issue Tracking
https://redmine.openinfosecfoundation.org/issues/8181
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