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CVE-2026-23381
medium
CVSS 5.5
Vulnerability in linux (CVE-2026-23381)
Summary
vulnerability in linux (CVE-2026-23381). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-23381** 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-2026-23381" on the vendor's site.
CVE-2026-23381 (linux) — CWE-476 / 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-476) 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/20ef5c25422f97dd09d751e5ae6c18406cdc78e6
- web https://git.kernel.org/stable/c/33dec6f10777d5a8f71c0a200f690da5ae3c2e55
- web https://git.kernel.org/stable/c/7a894eb5de246d79f13105c55a67381039a24d44
- web https://git.kernel.org/stable/c/a12cdaa3375f0bd3c8f4e564be7c143529abfe5b
- web https://git.kernel.org/stable/c/a5c56e65b685360dd3f2278aeff8c21061feb665
- web https://git.kernel.org/stable/c/a9d712ccfeef737c0e700a4b5b98f310e07b6b60
- web https://git.kernel.org/stable/c/aa73deb3b6b730ec280d45b3f423bfa9e17bc122
- web https://git.kernel.org/stable/c/e5e890630533bdc15b26a34bb8e7ef539bdf1322
- 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-2026-23381
- web https://github.com/advisories/GHSA-vm87-vmvc-9c38