← Back
CVE-2026-31686
high
CVSS 7.8
Vulnerability in linux (CVE-2026-31686)
Summary
vulnerability in linux (CVE-2026-31686). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31686** has been found in linux.
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 "linux CVE-2026-31686" on the vendor's site.
CVE-2026-31686 (linux) — CWE-415 / 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
**A vulnerability** (CWE-415) exists in linux.
📍 Affected scope
linux — .
🔥 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 '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
-
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。
-
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/2277246ea265cdca64ce6fdea4b26cd6ff0ec4db
- web https://git.kernel.org/stable/c/3298bdf5a878ded06351eb293856fa84e050029e
- web https://git.kernel.org/stable/c/51d8c78be0c27ddb91bc2c0263941d8b30a47d3b
- web https://git.kernel.org/stable/c/7d7b2d5c107a1f6302cf0006d859985e7c3ddd1c
- web https://git.kernel.org/stable/c/85d98614e089a67dc6faa8ca766fe10a639f82b4
- web https://git.kernel.org/stable/c/a05f77cb227c39c5069aea6f12762a29d1e6c103
- web https://git.kernel.org/stable/c/b38237a2ea9c6c19836eee2c57037e1f9f103576
- web https://git.kernel.org/stable/c/cec74b2ab7dff866b1d77eaa545b9e8fd14a1f87
- web https://git.kernel.org/stable/c/f6204f7ff6aff62ce6242a76982c5ba3a9ded707
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31686
- web https://github.com/advisories/GHSA-p63m-cmvw-gf7r