Vulnerability in Oisf Suricata
CVE-2026-45762
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, Suricata's IP defragmentation tracker lookup did not verify that an existing tracker used the same IP address family as the packet being processed. Under crafted fragmented IPv4/IPv6 traffic, an IPv6 fragment could be associated with an IPv4 defragmentation tracker. This can lead to a remote packet-triggered crash and denial of service when Suricata performs the relevant defragmentation. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, if using Suricata as an IDS with AF_PACKET, enabling AF_PACKET's `defrag` option may prevent Suricata from seeing such fragmented packets.
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: 0.006 (48.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Oisf Suricata — versions < 7.0.16, >= 8.0.0, < 8.0.5
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-gv2j-f6jv-3878 (Mitigation, Vendor Advisory)
- forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 (Release Notes)
- redmine.openinfosecfoundation.org/issues/8510 (Permissions Required)
Frequently asked questions
- What is CVE-2026-45762?
- CVE-2026-45762 is a high-severity vulnerability in Oisf Suricata, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 7.5/10. Published 2026-09-10.
- How severe is CVE-2026-45762?
- High severity. CVSS v3 base score is 7.5 out of 10.