Buffer overflow in Oisf Suricata
CVE-2025-64344
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Prior to versions 7.0.13 and 8.0.2, working with large buffers in Lua scripts can lead to a stack overflow. Users of Lua rules and output scripts may be affected when working with large buffers. This includes a rule passing a large buffer to a Lua script. This issue has been patched in versions 7.0.13 and 8.0.2. A workaround for this issue involves disabling Lua rules and output scripts, or making sure limits, such as stream.depth.reassembly and HTTP response body limits (response-body-limit), are set to less than half the stack size.
Vulnerability class: Buffer Overflow
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: 0.004 (26.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.5% 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 < 7.0.13, < 8.0.2
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-93fh-cgmc-w3rx (Third Party Advisory, Issue Tracking)
- github.com/OISF/suricata/commit/e13fe6a90dba210a478148c4084f6f5db17c5b5a (Patch)
Frequently asked questions
- What is CVE-2025-64344?
- CVE-2025-64344 is a high-severity vulnerability in Oisf Suricata, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2025-11-26.
- How severe is CVE-2025-64344?
- High severity. CVSS v3 base score is 7.5 out of 10.