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CVE-2026-23450
critical
CVSS 9.8
Use-After-Free in linux (CVE-2026-23450)
Summary
vulnerability in linux (CVE-2026-23450). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-23450** has been found in linux.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2026-23450" on the vendor's site.
CVE-2026-23450 (linux) — CWE-416 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / 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: Critical (CVSS 9.8/10). 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/1e4f873879e075bbd4eb1c644d6933303ac5eba4
- web https://git.kernel.org/stable/c/1fab5ece76fb42a761178dcd0ebcbf578377b0dd
- web https://git.kernel.org/stable/c/6d5e4538364b9ceb1ac2941a4deb86650afb3538
- web https://git.kernel.org/stable/c/cadf3da46c15523fba90d80c9955f536ee3b4023
- web https://git.kernel.org/stable/c/f00fc26c8a06442b225a350fe000c0a11483e6a3
- web https://git.kernel.org/stable/c/f315277856caeafcd996c2611afc085ca2d53275
- web https://git.kernel.org/stable/c/fd7579f0a2c84ba8a7d4f206201b50dc8ddf90c2
- web https://nvd.nist.gov/vuln/detail/CVE-2026-23450
- web https://github.com/advisories/GHSA-m7g4-hqc4-25c8