anicka/cve-backport-v4-dataset

Note: A newer, larger dataset is available: anicka/cve-backport-codegen-dataset (17,007 per-hunk code-generation examples). The newer dataset uses a code-generation format instead of direct patch generation, achieving 91% recall vs ~50% with this dataset's format. The corresponding model is anicka/cve-backport-codegen-qwen25-32b-v1.

CVE Backport Dataset v4

Source-context-aware security patch backporting dataset for openSUSE, with per-example license information.

Used to train cve-backport-qwen32b-phase3.

Files

File	Examples	Description
data/train-chatml.jsonl	1,883	Training split in ChatML format
data/eval-chatml.jsonl	148	Evaluation split in ChatML format

What this dataset contains

Each example is a real CVE backporting task: an upstream security patch paired with its adapted backport. 42% of examples also include relevant source code context from the target package version.

The model input (user message) contains:

• CVE identifier and description (from NVD)
• Target package name-version (e.g. libxml2-2.9.1)
• Files to modify (auto-detected from patch)
• Target source code (function-level context from the older version, when available)
• Upstream fix (unified diff)

The model output (assistant message) is the adapted backport patch in Index: quilt format.

Example structure

{
  "messages": [
    {"role": "system", "content": "You are a security patch backporting assistant..."},
    {"role": "user", "content": "## CVE: CVE-2022-29824\n...upstream patch...\nGenerate a backported patch..."},
    {"role": "assistant", "content": "Index: libxml2-2.9.1/buf.c\n===\n--- ..."}
  ],
  "metadata": {
    "id": "libxml2-1234-fix.patch",
    "cve_id": "CVE-2022-29824",
    "package": "libxml2",
    "tier": "adapted",
    "has_source_context": true,
    "context_tokens_est": 1200,
    "context_files": 2,
    "license": "MIT"
  }
}

Coverage

• 90 packages across 200+ CVEs
• Top packages: openssl (179), krb5 (127), krb5-mini (124), libxml2 (116), systemd (96)
• 42% with source context from upstream tarballs

Source and licensing

Derived from publicly available patches in the openSUSE Open Build Service. Each example's metadata.license field indicates the license of the source package. CVE descriptions are from the National Vulnerability Database (public domain).

License distribution

License family	Count	Percentage
LGPL	507	25.0%
MIT	495	24.4%
GPL-3.x	189	9.3%
BSD	178	8.8%
GPL-2.x	163	8.0%
MPL	79	3.9%
Apache	32	1.6%
Other (OpenSSL, ImageMagick, Zlib, etc.)	388	19.1%

Intended use

Training models to assist with security patch backporting — adapting upstream CVE fixes for older openSUSE package versions.

References

• cve-backport-tool — CLI inference tool
• cve-backport-codegen-qwen25-32b-v1 — latest trained model
• openSUSE Open Build Service