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CVE-2025-40300
medium
CVSS 5.5
Vulnerability in linux (CVE-2025-40300)
Summary
vulnerability in linux (CVE-2025-40300). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-40300** 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-2025-40300" on the vendor's site.
CVE-2025-40300 (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/15006289e5c38b2a830e1fba221977a27598176c
- web https://git.kernel.org/stable/c/2f4f2f8f860cb4c3336a7435ebe8dcfded0c9c6e
- web https://git.kernel.org/stable/c/2f8f173413f1cbf52660d04df92d0069c4306d25
- web https://git.kernel.org/stable/c/34e5667041050711a947e260fc9ebebe08bddee5
- web https://git.kernel.org/stable/c/459274c77b37ac63b78c928b4b4e748d1f9d05c8
- web https://git.kernel.org/stable/c/510603f504796c3535f67f55fb0b124a303b44c8
- web https://git.kernel.org/stable/c/893387c18612bb452336a5881da0d015a7e8f4a2
- web https://git.kernel.org/stable/c/9c23a90648e831d611152ac08dbcd1283d405e7f
- web https://git.kernel.org/stable/c/ac60717f9a8d21c58617d0b34274babf24135835
- web https://git.kernel.org/stable/c/c08192b5d6730a914dee6175bc71092ee6a65f14
- web https://git.kernel.org/stable/c/d5490dfa35427a2967e00a4c7a1b95fdbc8ede34
- web https://git.kernel.org/stable/c/d7ddc93392e4a7ffcccc86edf6ef3e64c778db52
- web https://git.kernel.org/stable/c/f866eef8d1c65504d30923c3f14082ad294d0e6d
- web http://www.openwall.com/lists/oss-security/2025/11/14/3
- web http://www.openwall.com/lists/oss-security/2025/11/14/4
- web http://www.openwall.com/lists/oss-security/2025/11/14/6
- web http://www.openwall.com/lists/oss-security/2025/11/17/2
- web http://www.openwall.com/lists/oss-security/2025/11/17/3
- web https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- web https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- web https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- web https://nvd.nist.gov/vuln/detail/CVE-2025-40300
- web https://github.com/advisories/GHSA-x8qw-46ww-c957