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CVE-2026-46270
high
CVSS 8.4
Use-After-Free in linux (CVE-2026-46270)
Summary
vulnerability in linux (CVE-2026-46270). Successful exploitation can lead to full system takeover. Exploitable via ``devm_``.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-46270** has been found in linux.
Attackers can target a specific entry point like ``devm_`` over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 8.4/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2026-46270" on the vendor's site.
CVE-2026-46270 (linux) — CWE-416 / CVSS v3 8.4
Attack vector: local / unauthenticated / no user interaction
Attack surface: `devm_` / `power_supply`
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
**use-after-free** (CWE-416) exists in linux. Attackers reach the vulnerable code path via ``devm_`` without authentication.
📍 Affected scope
linux — . Attack surface: `devm_` / `power_supply`.
🔥 Severity
Severity: High (CVSS 8.4/10). Successful exploitation can lead to full system takeover
🔧 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://nvd.nist.gov/vuln/detail/CVE-2026-46270
- web https://git.kernel.org/stable/c/2178dc65d45e2f7bcaa8af8d80d100419bdab251
- web https://git.kernel.org/stable/c/62d753b916bd500bb269b7078cdab73198ab4718
- web https://git.kernel.org/stable/c/64e15155095f39f4dec9b4659da1238ef8fc54d4
- web https://git.kernel.org/stable/c/721449a15170fc5f028a7576d7f65b9f60d53482
- web https://git.kernel.org/stable/c/a39f8f06216f73ef40e71e2fe4ad071964c1fd36
- web https://git.kernel.org/stable/c/af261f218a7606f93d2c786353d60bb4feb56ef0
- web https://git.kernel.org/stable/c/d4e2e3c3caa26b93aa9f36d0a6824b584e2a8dfc
- web https://git.kernel.org/stable/c/e2febe375e5ea5afed92f4cd9711bde8f24ee6d2
- web https://github.com/advisories/GHSA-vj56-8x44-c882