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CVE-2025-39813
medium
CVSS 4.7
Vulnerability in linux (CVE-2025-39813)
Summary
vulnerability in linux (CVE-2025-39813). Risk of unauthorized operations or information disclosure. Exploitable via ``iter.seq``.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-39813** has been found in linux.
Attackers can target a specific entry point like ``iter.seq`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 4.7/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2025-39813" on the vendor's site.
CVE-2025-39813 (linux) — CWE-362 / CVSS v3 4.7
Attack vector: local / no user interaction
Attack surface: `iter.seq` / `iter.seq.len` / `iter.seq.size`
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-362) exists in linux. Attackers reach the vulnerable code path via ``iter.seq`` without authentication.
📍 Affected scope
linux — . Attack surface: `iter.seq` / `iter.seq.len` / `iter.seq.size`.
🔥 Severity
Severity: Medium (CVSS 4.7/10). 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/28c8fb7ae2ad27d81c8de3c4fe608c509f6a18aa
- web https://git.kernel.org/stable/c/4013aef2ced9b756a410f50d12df9ebe6a883e4a
- web https://git.kernel.org/stable/c/5ab0ec206deb99eb3baf8f1d7602aeaa91dbcc85
- web https://git.kernel.org/stable/c/a6f0f8873cc30fd4543b09adf03f7f51d293f0e6
- web https://git.kernel.org/stable/c/ced94e137e6cd5e79c65564841d3b7695d0f5fa3
- web https://git.kernel.org/stable/c/e80ff23ba8bdb0f41a1afe2657078e4097d13a9a
- web https://git.kernel.org/stable/c/f299353e7ccbcc5c2ed8993c48fbe7609cbe729a
- web https://git.kernel.org/stable/c/fbd4cf7ee4db65ef36796769fe978e9eba6f0de4
- 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-2025-39813
- web https://github.com/advisories/GHSA-cfrf-hx42-xr6f