CVE-2026-31931
HIGHCVSS 7.5/10EPSS 0.35%
Last modified
CVE-2026-31931 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.35% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Oisf | Suricata | >= 8.0.0, < 8.0.4 |
References
- https://redmine.openinfosecfoundation.org/issues/8294Issue Tracking, Permissions Required
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is 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.
How severe is CVE-2026-31931?
CVE-2026-31931 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.
How do I fix CVE-2026-31931?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2026-31931?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST