Use After Free in Oisf Suricata
CVE-2026-22264
Suricata is a network IDS, IPS and NSM engine. Prior to version 8.0.3 and 7.0.14, an unsigned integer overflow can lead to a heap use-after-free condition when generating excessive amounts of alerts for a single packet. Versions 8.0.3 and 7.0.14 contain a patch. As a workaround, do not run untrusted rulesets or run with less than 65536 signatures that can match on the same packet.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (32.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.3% 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 < 7.0.14, >= 8.0.0, < 8.0.3
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-mqr8-m3m4-2hw5 (Vendor Advisory)
- github.com/OISF/suricata/commit/549d7bf60616de8e54686a188196453b5b22f715 (Patch)
- github.com/OISF/suricata/commit/5789a3d3760dbf33d93fc56c27bd9529e5bdc8f2 (Patch)
- github.com/OISF/suricata/commit/ac1eb394181530430fb7262969f423a1bf8f209b (Patch)
- redmine.openinfosecfoundation.org/issues/8190 (Permissions Required)
Frequently asked questions
- What is CVE-2026-22264?
- CVE-2026-22264 is a high-severity vulnerability in Oisf Suricata, classified under Use After Free. CVSS score: 7.4/10. Published 2026-01-27.
- How severe is CVE-2026-22264?
- High severity. CVSS v3 base score is 7.4 out of 10.