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CVE-2025-39770
medium
CVSS 5.5
Vulnerability in c (CVE-2025-39770)
Summary
vulnerability in c (CVE-2025-39770). Risk of unauthorized operations or information disclosure. Exploitable via ``skb_warn_bad_offload``.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-39770** has been found in c.
Attackers can target a specific entry point like ``skb_warn_bad_offload`` over the network to misuse the product.
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-2025-39770" on the vendor's site.
CVE-2025-39770 (c) — CVSS v3 5.5
Attack vector: local / no user interaction
Attack surface: `skb_warn_bad_offload`
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 c. Attackers reach the vulnerable code path via ``skb_warn_bad_offload`` without authentication.
📍 Affected scope
c — . Attack surface: `skb_warn_bad_offload`.
🔥 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/041e2f945f82fdbd6fff577b79c33469430297aa
- web https://git.kernel.org/stable/c/2156d9e9f2e483c8c3906c0ea57ea312c1424235
- web https://git.kernel.org/stable/c/794ddbb7b63b6828c75967b9bcd43b086716e7a1
- web https://git.kernel.org/stable/c/864e3396976ef41de6cc7bc366276bf4e084fff2
- web https://git.kernel.org/stable/c/a0478d7e888028f85fa7785ea838ce0ca09398e2
- 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://cert-portal.siemens.com/productcert/html/ssa-082556.html
- web https://nvd.nist.gov/vuln/detail/CVE-2025-39770
- web https://github.com/advisories/GHSA-v36v-frvv-6h39