← Back
CVE-2026-31583
high
CVSS 7.8
Use-After-Free in linux (CVE-2026-31583)
Summary
vulnerability in linux (CVE-2026-31583). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31583** 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-2026-31583" on the vendor's site.
CVE-2026-31583 (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。
-
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/2cbf81f76842e46bdf25823c70e1db4044a65678
- web https://git.kernel.org/stable/c/38a327221f7f765e7d853b7bafe47e342441ec85
- web https://git.kernel.org/stable/c/3c0283a59e36e3707c4a81f4952e362d31f876b8
- web https://git.kernel.org/stable/c/5fb2940327722b4684d2f964b54c1c90aa277324
- web https://git.kernel.org/stable/c/6b9e66437cc6123ddedac141e1b8b6fcf57d2972
- web https://git.kernel.org/stable/c/871b8ea8ef39a6c253594649f4339378fad3d0dd
- web https://git.kernel.org/stable/c/a66485a934c7187ae8e36517d40615fa2e961cff
- web https://git.kernel.org/stable/c/b5d141ea15f173f15b9f0a72965902f3428c0d92
- web https://git.kernel.org/stable/c/dd2b888e08d3b3d6aacd65d76cd44fac11da750f
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31583
- web https://github.com/advisories/GHSA-2hvg-8mmr-f5mc