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CVE-2025-39839
high
CVSS 7.1
Out-of-Bounds Read in linux (CVE-2025-39839)
Summary
vulnerability in linux (CVE-2025-39839). Confidential information can be exposed externally.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-39839** has been found in linux.
Confidential information can be exposed externally. CVSS score: 7.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2025-39839" on the vendor's site.
CVE-2025-39839 (linux) — CWE-125 / CVSS v3 7.1
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
**out-of-bounds read** (CWE-125) exists in linux.
📍 Affected scope
linux — .
🔥 Severity
Severity: High (CVSS 7.1/10). Confidential information can be exposed externally
🔧 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/1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183
- web https://git.kernel.org/stable/c/20080709457bc1e920eb002483d7d981d9b2ac1c
- web https://git.kernel.org/stable/c/30fc47248f02b8a14a61df469e1da4704be1a19f
- web https://git.kernel.org/stable/c/5d334bce9fad58cf328d8fa14ea1fff855819863
- web https://git.kernel.org/stable/c/a67c6397fcb7e842d3c595243049940970541c48
- web https://git.kernel.org/stable/c/bb37252c9af1cb250f34735ee98f80b46be3cef1
- web https://git.kernel.org/stable/c/d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087
- web https://git.kernel.org/stable/c/dce6c2aa70e94c04c523b375dfcc664d7a0a560a
- 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://cert-portal.siemens.com/productcert/html/ssa-089022.html
- web https://nvd.nist.gov/vuln/detail/CVE-2025-39839
- web https://github.com/advisories/GHSA-2j47-jhvw-fgmm