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CVE-2025-21862
medium
CVSS 5.5
Vulnerability in c (CVE-2025-21862)
Summary
vulnerability in c (CVE-2025-21862). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-21862** has been found in c.
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 "c CVE-2025-21862" on the vendor's site.
CVE-2025-21862 (c) — CWE-908 / 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-908) exists in c.
📍 Affected scope
c — .
🔥 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 'c' .` 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 'c' . | 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 `c` 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/07b598c0e6f06a0f254c88dafb4ad50f8a8c6eea
- web https://git.kernel.org/stable/c/0efa6c42f81c60d8f72ba7f5ed8d4fec8c526282
- web https://git.kernel.org/stable/c/219a47d0e6195bd202f22855e35f25bd15bc4d58
- web https://git.kernel.org/stable/c/29f9cdcab3d96d5207a5c92b52c40ad75e5915d8
- web https://git.kernel.org/stable/c/6e9e0f224ffd8b819da3ea247dda404795fdd182
- web https://git.kernel.org/stable/c/872c7c7e57a746046796ddfead529c9d37b9f6b4
- web https://git.kernel.org/stable/c/b7859e8643e75619b2705b4fcac93ffd94d72b4a
- web https://git.kernel.org/stable/c/fcfc00bfec7bb6661074cb21356d05a4c9470a3c
- web https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- web https://lists.debian.org/debian-lts-announce/2025/05/msg00045.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-2025-21862
- web https://github.com/advisories/GHSA-fm6j-mfpf-prfq