NULL pointer dereference in Oisf Suricata
CVE-2026-45747
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to version 7.0.16, the Lua TLS certificate information helper could dereference NULL certificate fields when a Lua script requested certificate information for TLS traffic where some certificate fields were absent. Crafted TLS traffic processed by a deployment using affected Lua TLS scripting could crash Suricata, resulting in denial of service. Version 7.0.16 contains a fix. As a workaround, avoid Lua scripts that call TLS certificate information helpers on untrusted traffic (`TlsGetCertInfo` function), or update scripts to handle missing certificate fields where possible.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Oisf Suricata — versions < 7.0.16
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-vfc5-9844-rmhv (Mitigation, Vendor Advisory)
- forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 (Release Notes, Vendor Advisory)
- redmine.openinfosecfoundation.org/issues/6286 (Exploit, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45747?
- CVE-2026-45747 is a high-severity vulnerability in Oisf Suricata, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-09-10.
- How severe is CVE-2026-45747?
- High severity. CVSS v3 base score is 7.5 out of 10.