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CVE-2026-31586
high
CVSS 7.8
Use-After-Free in c (CVE-2026-31586)
Summary
vulnerability in c (CVE-2026-31586). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31586** 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-2026-31586" on the vendor's site.
CVE-2026-31586 (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
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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。
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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/115a5266749dcde7fe4127e8623d19c752088f69
- web https://git.kernel.org/stable/c/1bd36e93b542d9dd020190c6607c6a3663405195
- web https://git.kernel.org/stable/c/23acef4156c260e8598397a1a2e8b3a23e919893
- web https://git.kernel.org/stable/c/50879a3c1faf06e661090015d59e2127255cff27
- web https://git.kernel.org/stable/c/67cb119d32f35e32acd0393bbeb318b2bb1fdafe
- web https://git.kernel.org/stable/c/740ba1ebb223f137ff088ab74d533a13f9167bd8
- web https://git.kernel.org/stable/c/8f5857be99f1ed1fa80991c72449541f634626ee
- web https://git.kernel.org/stable/c/dfc8292a1d6782c76b626315605e0585a5a18447
- web https://git.kernel.org/stable/c/ea3af09eb87d8f8708c66747fcf1a2762902e839
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31586
- web https://github.com/advisories/GHSA-x7q8-xcw2-7mfg