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CVE-2026-31658
medium
CVSS 5.5
Vulnerability in linux (CVE-2026-31658)
Summary
vulnerability in linux (CVE-2026-31658). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31658** has been found in linux.
Risk of unauthorized operations or information disclosure. CVSS score: 5.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2026-31658" on the vendor's site.
CVE-2026-31658 (linux) — CWE-401 / CVSS v3 5.5
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-401) exists in linux.
📍 Affected scope
linux — .
🔥 Severity
Severity: Medium (CVSS 5.5/10). Risk of unauthorized operations or information disclosure
🔧 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。
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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/2eb9d67704ca8f1101f7435b85f113ede471f9f2
- web https://git.kernel.org/stable/c/3aca300e88afe56afb000cdc4c65383014fb17f9
- web https://git.kernel.org/stable/c/60f462cd2716d86bd2174f9d5e035c9278f30480
- web https://git.kernel.org/stable/c/6dede3967619b5944003227a5d09fdc21ed57d10
- web https://git.kernel.org/stable/c/9f3ec44aeb58501d11834048d5d0dbaeacb6d4e7
- web https://git.kernel.org/stable/c/ae2cd46f57f422b51aedd406ff5d75cbff401d5d
- web https://git.kernel.org/stable/c/cb1d318702fdf643061350d164250198df4116f2
- web https://git.kernel.org/stable/c/d5ec406f0543bd6cdfd563b08015fdec8c4d5712
- web https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- web https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31658
- web https://github.com/advisories/GHSA-fm9r-m74h-jfjj