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CVE-2026-31637
critical
CVSS 9.8
Vulnerability in linux (CVE-2026-31637)
Summary
vulnerability in linux (CVE-2026-31637). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31637** has been found in linux.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2026-31637" on the vendor's site.
CVE-2026-31637 (linux) — CVSS v3 9.8
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 9.8/10). 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 '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/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60
- web https://git.kernel.org/stable/c/252157d939d179b5d767cb860ff8fa7f8723b67a
- web https://git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a
- web https://git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7d
- web https://git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7de
- web https://git.kernel.org/stable/c/a75b3b361dd481d942c5f259a82d59718a41092c
- web https://git.kernel.org/stable/c/b3a808cd0790b5075aaa2bc3588edf02cd71d352
- web https://git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31637
- web https://github.com/advisories/GHSA-45qq-4p94-jp2v