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CVE-2026-31603
medium
CVSS 5.5
Vulnerability in linux (CVE-2026-31603)
Summary
vulnerability in linux (CVE-2026-31603). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31603** 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-2026-31603" on the vendor's site.
CVE-2026-31603 (linux) — CWE-369 / 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-369) 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。
-
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/124a43550db8a74eef080cd4573a4904efe67029
- web https://git.kernel.org/stable/c/1412ba36597a82e928f20047f41d6c6582dafe8a
- web https://git.kernel.org/stable/c/2f640c6043aeab31a2f607d7605271860c3b11df
- web https://git.kernel.org/stable/c/3300b049693138852a4c6738b5f1194a1ee91ddd
- web https://git.kernel.org/stable/c/6144895a4335a2491c282931f1f2fa610b86339f
- web https://git.kernel.org/stable/c/75a1621e4f91310673c9acbcbb25c2a7ff821cd3
- web https://git.kernel.org/stable/c/779412e0e391fd4a0d12e1d1adaa7bf043de62d7
- web https://git.kernel.org/stable/c/b285a8f3bbb821a93eb37c2740a68ca1d7112a59
- web https://git.kernel.org/stable/c/daf6733bd7c4c5015b431739ac29b0e29021096b
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31603
- web https://github.com/advisories/GHSA-rfh9-x593-fmpr