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CVE-2026-31576
high
CVSS 7.8
Use-After-Free in linux (CVE-2026-31576)
Summary
vulnerability in linux (CVE-2026-31576). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31576** 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-2026-31576" on the vendor's site.
CVE-2026-31576 (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/07e9e674b6146b1f6fc41b1f54b8968bf2802824
- web https://git.kernel.org/stable/c/131ec9046e1c8af101aebdaec4e8095e05f3312b
- web https://git.kernel.org/stable/c/2145c71a8044362e82e9923f001ba2aeb771b848
- web https://git.kernel.org/stable/c/3b7da2b4d0fe014eff181ed37e3bf832eb8ed258
- web https://git.kernel.org/stable/c/45cbaf5c7cdc5386d86377f0daf94a17a007fed0
- web https://git.kernel.org/stable/c/67fd62e3efdc9dce01f76d95a745212f4feb38e6
- web https://git.kernel.org/stable/c/87b9685cca91ed715c39ba544715832d26a7f4b4
- web https://git.kernel.org/stable/c/98a0a81ce78020c2522e0046f49d200de9778cb9
- web https://git.kernel.org/stable/c/fcd1d70792a35c8a97414fe429f48311e41269c2
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31576
- web https://github.com/advisories/GHSA-9h3v-wrpm-q7m5