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UBUNTU-CVE-2026-40225
Vulnerability in systemd (UBUNTU-CVE-2026-40225)
Summary
vulnerability in systemd (UBUNTU-CVE-2026-40225). Successful exploitation can lead to full system takeover. Mitigation: upgrade to `245.4-4ubuntu3.24+esm3` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **UBUNTU-CVE-2026-40225** has been found in systemd.
Successful exploitation can lead to full system takeover. CVSS score: ?/10.
What to do: upgrade systemd to **245.4-4ubuntu3.24+esm3** or later.
If unsure, ask your IT team or search "systemd UBUNTU-CVE-2026-40225" on the vendor's site.
UBUNTU-CVE-2026-40225 (systemd) —
Attack vector: physical / unauthenticated / no user interaction
Patched: `245.4-4ubuntu3.24+esm3` — apply immediately
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
**A vulnerability** (unclassified) exists in systemd.
📍 Affected scope
systemd — .
🔥 Severity
Severity: ?. Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **245.4-4ubuntu3.24+esm3**.
🛡️ 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 'systemd' .` 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 'systemd' . | 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 `systemd` 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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6Apply patch patch
Upgrade systemd to 245.4-4ubuntu3.24+esm3ステージング環境で 245.4-4ubuntu3.24+esm3 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。
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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。
Affected packages
Ubuntu:Pro:14.04:LTS
systemd
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:16.04:LTS
systemd
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:18.04:LTS
systemd
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:20.04:LTS
systemd
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"245.4-4ubuntu3.24+esm3"}]}]
Ubuntu:22.04:LTS
systemd
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"249.11-0ubuntu3.19"}]}]
Ubuntu:24.04:LTS
systemd
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"255.4-1ubuntu8.14"}]}]
Ubuntu:25.10
systemd
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"257.9-0ubuntu2.3"}]}]
Ubuntu:26.04:LTS
systemd
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]