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CVE-2026-23281
high
CVSS 7.8
Use-After-Free in linux (CVE-2026-23281)
Summary
vulnerability in linux (CVE-2026-23281). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-23281** has been found in linux.
Successful exploitation can lead to full system takeover. CVSS score: 7.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2026-23281" on the vendor's site.
CVE-2026-23281 (linux) — CWE-416 / CVSS v3 7.8
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
**use-after-free** (CWE-416) exists in linux.
📍 Affected scope
linux — .
🔥 Severity
Severity: High (CVSS 7.8/10). 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
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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。
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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/03cc8f90d0537fcd4985c3319b4fafbf2e3fb1f0
- web https://git.kernel.org/stable/c/09f3c30ab3b1371eaf9676a1b8add57bca763083
- web https://git.kernel.org/stable/c/3c5c818c78b03a1725f3dcd566865c77b48dd3a6
- web https://git.kernel.org/stable/c/3f9dec4a6d95d7f1f5e9e9dfdfa173c053bba8dc
- web https://git.kernel.org/stable/c/a9f55b14486426d907459bced5825a25063bd922
- web https://git.kernel.org/stable/c/b15e0fa7adb4de3a03aee9e6fc4d83e5cf0a65e4
- web https://git.kernel.org/stable/c/d0155fe68f31b339961cf2d4f92937d57e9384e6
- web https://git.kernel.org/stable/c/ed7d30f90b77f73a47498686ede83f622b7e4f0d
- web https://nvd.nist.gov/vuln/detail/CVE-2026-23281
- web https://github.com/advisories/GHSA-f429-w42v-q89c