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CVE-2026-31685
critical
CVSS 9.4
Vulnerability in linux (CVE-2026-31685)
Summary
vulnerability in linux (CVE-2026-31685). Confidential information can be exposed externally.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31685** has been found in linux.
Confidential information can be exposed externally. CVSS score: 9.4/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2026-31685" on the vendor's site.
CVE-2026-31685 (linux) — CVSS v3 9.4
Attack vector: remote (network-reachable) / unauthenticated / 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
**A vulnerability** (unclassified) exists in linux.
📍 Affected scope
linux — .
🔥 Severity
Severity: Critical (CVSS 9.4/10). Confidential information can be exposed externally
🔧 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 'linux' .` 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 'linux' . | 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 `linux` 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/288138418bef956f8b295751a4536c60f0e89f4a
- web https://git.kernel.org/stable/c/309ae3e9a51a69699ca94eac5fac5688fa562d55
- web https://git.kernel.org/stable/c/4d75bc2cd093bf5803edf512c099bfb220fd6459
- web https://git.kernel.org/stable/c/7d6a57411caf54df025860c9b1a82cd42d57a562
- web https://git.kernel.org/stable/c/807d6ee15804df6f01a35c910f09612e858739a6
- web https://git.kernel.org/stable/c/9eda5478746ef7dc0e4e537b5a5e4b0ca1027091
- web https://git.kernel.org/stable/c/d5603591373441fecf9951833d6d873e09320f08
- web https://git.kernel.org/stable/c/fdce0b3590f724540795b874b4c8850c90e6b0a8
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31685
- web https://github.com/advisories/GHSA-hf2p-g3jq-w2mx