CVE-2026-45761
Publication date 14 September 2026
Last updated 14 September 2026
Ubuntu priority
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, a crafted rule using mixed-case frame syntax could trigger a heap buffer overflow while Suricata is loading signatures. The issue is reached during rule parsing/loading rather than by network traffic alone. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, preprocess rules to check that frames are all lowercase and/or only load trusted rulesets.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| suricata | 26.04 LTS resolute |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
3.3 · Low
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-45761
- https://github.com/OISF/suricata/security/advisories/GHSA-r74x-74x5-r9vm
- https://redmine.openinfosecfoundation.org/issues/8528 (suricata-7.0.16)
- https://redmine.openinfosecfoundation.org/issues/8527 (suricata-8.0.5)
- https://github.com/OISF/suricata/commit/df3336bf4f8e8034570b1608f87065391d79c022 (suricata-7.0.16)
- https://github.com/OISF/suricata/commit/31d3977720990bb0efd20be08a6c2362287ea460 (suricata-8.0.5)
- https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315
- https://redmine.openinfosecfoundation.org/issues/8526