# CVE-2025-59149: Suricata: Stack buffer overflow in rule parser when processing long keywords with transforms

> A stack buffer overflow in Suricata's rule parser allows attackers to cause denial of service or execute code via crafted rules with long keywords and transforms.

- **Severity:** Medium 6.2 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Oct 2025
- **Updated:** 1 Oct 2025
- **Also known as:** GHSA-vxcg-38x4-gj7j, UBUNTU-CVE-2025-59149

## What is CVE-2025-59149?

CVE-2025-59149 is a medium-severity memory corruption vulnerability in Oisf Suricata, published on 1 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In version 8.0.0, rules using keyword ldap.responses.attribute_type (which is long) with transforms can lead to a stack buffer overflow during Suricata startup or during a rule reload. This issue is fixed in version 8.0.1. To workaround this issue, users can disable rules with ldap.responses.attribute_type and transforms.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2025-59149?

It affects 1 product.


Products: Oisf Suricata.

## How do I fix CVE-2025-59149?

Upgrade to a fixed version.

## Is CVE-2025-59149 being exploited?

There is no known exploitation of CVE-2025-59149 in the wild and no public exploit code.

## Other vulnerabilities in Oisf Suricata

- [CVE-2023-35853](https://insights.sbomify.com/CVE-2023-35853/): Code injection in n/a (critical 9.8)
- [CVE-2021-37592](https://insights.sbomify.com/CVE-2021-37592/): Other in n/a (critical 9.8)
- [CVE-2018-10244](https://insights.sbomify.com/CVE-2018-10244/): Integer overflow in n/a (critical 9.8)
- [CVE-2026-94083](https://insights.sbomify.com/CVE-2026-94083/): Memory corruption in Suricata (critical 9.4)
- [CVE-2026-94084](https://insights.sbomify.com/CVE-2026-94084/): Use after free in Suricata (critical 9.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-59149 and fix it if it is affected.

What it is: CVE-2025-59149 is a medium-severity memory corruption vulnerability in Oisf Suricata, published on 1 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-59149 in the wild and no public exploit code.

Affected product: Oisf Suricata. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-59149/ (Markdown: https://insights.sbomify.com/CVE-2025-59149/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-59149
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-59149
- OSV: https://osv.dev/vulnerability/CVE-2025-59149

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-59149/
Summaries are generated and may contain mistakes; the official description above is the record.