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CVE-2025-39860
high
CVSS 7.8
Use-After-Free in c (CVE-2025-39860)
Summary
vulnerability in c (CVE-2025-39860). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-39860** has been found in c.
Successful exploitation can lead to full system takeover. CVSS score: 7.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "c CVE-2025-39860" on the vendor's site.
CVE-2025-39860 (c) — CWE-416 / CVSS v3 7.8
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**use-after-free** (CWE-416) exists in c.
📍 Affected scope
c — .
🔥 Severity
Severity: High (CVSS 7.8/10). Successful exploitation can lead to full system takeover
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'c' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'c' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `c` を grep し、稼働しているサービス・バージョンを把握する。
-
7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
References
- web https://git.kernel.org/stable/c/2ca99fc3512a8074de20ee52a87b492dfcc41a4d
- web https://git.kernel.org/stable/c/306b0991413b482dbf5585b423022123bb505966
- web https://git.kernel.org/stable/c/3dff390f55ccd9ce12e91233849769b5312180c2
- web https://git.kernel.org/stable/c/47f6090bcf75c369695d21c3f179db8a56bbbd49
- web https://git.kernel.org/stable/c/6077d16b5c0f65d571eee709de2f0541fb5ef0ca
- web https://git.kernel.org/stable/c/83e1d9892ef51785cf0760b7681436760dda435a
- web https://git.kernel.org/stable/c/862c628108562d8c7a516a900034823b381d3cba
- web https://git.kernel.org/stable/c/964cbb198f9c46c2b2358cd1faffc04c1e8248cf
- web https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- web https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- web https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- web https://cert-portal.siemens.com/productcert/html/ssa-089022.html
- web https://nvd.nist.gov/vuln/detail/CVE-2025-39860
- web https://github.com/advisories/GHSA-c684-q9wg-vhh9