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CVE-2025-21765
medium
CVSS 5.5
Vulnerability in linux (CVE-2025-21765)
Summary
vulnerability in linux (CVE-2025-21765). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-21765** 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-2025-21765" on the vendor's site.
CVE-2025-21765 (linux) — 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** (unclassified) 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/28de355b63ad42309ed5a03ee7c436c90512265b
- web https://git.kernel.org/stable/c/3c8ffcd248da34fc41e52a46e51505900115fc2a
- web https://git.kernel.org/stable/c/4176a68b0db8fc74ac14fcd00ba8231371051dc2
- web https://git.kernel.org/stable/c/550ed693f47370502a71b85382e7f9e6417300b8
- web https://git.kernel.org/stable/c/713a40c892f40300d63691d9f85b2a23b48fe1e8
- web https://git.kernel.org/stable/c/78ad057472d8c76e0602402269222f9f9c698790
- web https://git.kernel.org/stable/c/84212387caadb211cd9dadd6fd5563bd37dc1f5e
- web https://git.kernel.org/stable/c/d02f30d220ef9511568a48dba8a9004c65f8d904
- web https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- web https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- web https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- web https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- web https://nvd.nist.gov/vuln/detail/CVE-2025-21765
- web https://github.com/advisories/GHSA-cfq6-3hq6-2p95