NULL pointer dereference in Oisf Suricata
CVE-2026-31931
Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the "tls.alpn" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4.
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: 0.005 (38.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.0% 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: 0.005 · change: +0.001
Affected products
- Oisf Suricata — versions >= 8.0.0, < 8.0.4
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-gr22-4784-xvw3 (Vendor Advisory)
- redmine.openinfosecfoundation.org/issues/8294 (Permissions Required, Issue Tracking)
Frequently asked questions
- What is CVE-2026-31931?
- CVE-2026-31931 is a high-severity vulnerability in Oisf Suricata, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-04-02.
- How severe is CVE-2026-31931?
- High severity. CVSS v3 base score is 7.5 out of 10.