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CVE-2026-23458
high
CVSS 7.8
Use-After-Free in linux (CVE-2026-23458)
Summary
vulnerability in linux (CVE-2026-23458). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-23458** 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-2026-23458" on the vendor's site.
CVE-2026-23458 (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
-
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/04c8907ce4e3d3e26c5e1a3e47aa5d17082cbb56
- web https://git.kernel.org/stable/c/5cb81eeda909dbb2def209dd10636b51549a3f8a
- web https://git.kernel.org/stable/c/9821b47f669eb82791fa0b1a6ebaf9aa219bea72
- web https://git.kernel.org/stable/c/bdf2724eefd4455a66863abb025bab8d3aa98c57
- web https://git.kernel.org/stable/c/cd541f15b60e2257441398cf495d978f816d09f8
- web https://git.kernel.org/stable/c/d8cd0efbccc5cfb0a80da744a7da76e1333ab925
- web https://git.kernel.org/stable/c/f025171feef2ac65663d7986f1d5ff0c28d6b2a9
- web https://git.kernel.org/stable/c/f04cc86d59906513d2d62183b882966fc0ae0390
- web https://nvd.nist.gov/vuln/detail/CVE-2026-23458
- web https://github.com/advisories/GHSA-pqg4-x7w2-6f65