CVE-2026-31931: CWE-476: NULL Pointer Dereference in OISF suricata
A NULL pointer dereference vulnerability exists in Suricata versions 8. 0. 0 through 8. 0. 3 when using the "tls. alpn" rule keyword, which can cause the application to crash. This issue has been fixed in version 8. 0. 4. The vulnerability has a high severity rating with a CVSS score of 7.
AI Analysis
Technical Summary
CVE-2026-31931 is a high-severity vulnerability in the OISF Suricata network IDS/IPS/NSM engine affecting versions 8.0.0 up to but not including 8.0.4. The flaw is a NULL pointer dereference triggered by the use of the "tls.alpn" rule keyword, leading to application crashes and denial of service. The issue has been addressed and patched in Suricata version 8.0.4.
Potential Impact
Successful exploitation causes Suricata to crash, resulting in denial of service. There is no impact on confidentiality or integrity. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Upgrade Suricata to version 8.0.4 or later, where this vulnerability has been patched. Until the upgrade is applied, avoid using the "tls.alpn" rule keyword to prevent triggering the NULL pointer dereference.
CVE-2026-31931: CWE-476: NULL Pointer Dereference in OISF suricata
Description
A NULL pointer dereference vulnerability exists in Suricata versions 8. 0. 0 through 8. 0. 3 when using the "tls. alpn" rule keyword, which can cause the application to crash. This issue has been fixed in version 8. 0. 4. The vulnerability has a high severity rating with a CVSS score of 7.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-31931 is a high-severity vulnerability in the OISF Suricata network IDS/IPS/NSM engine affecting versions 8.0.0 up to but not including 8.0.4. The flaw is a NULL pointer dereference triggered by the use of the "tls.alpn" rule keyword, leading to application crashes and denial of service. The issue has been addressed and patched in Suricata version 8.0.4.
Potential Impact
Successful exploitation causes Suricata to crash, resulting in denial of service. There is no impact on confidentiality or integrity. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Upgrade Suricata to version 8.0.4 or later, where this vulnerability has been patched. Until the upgrade is applied, avoid using the "tls.alpn" rule keyword to prevent triggering the NULL pointer dereference.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-10T15:10:10.653Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69ce7bd9e6bfc5ba1ddfe6d2
Added to database: 4/2/2026, 2:23:21 PM
Last enriched: 4/10/2026, 12:09:11 AM
Last updated: 5/20/2026, 8:50:53 PM
Views: 44
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