Vulnerability in samba (OESA-2026-2574)

Summary

vulnerability in samba (OESA-2026-2574). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `4.17.5-15.oe2203sp4` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **OESA-2026-2574** has been found in samba. Risk of unauthorized operations or information disclosure. CVSS score: ?/10. What to do: upgrade samba to **4.17.5-15.oe2203sp4** or later. If unsure, ask your IT team or search "samba OESA-2026-2574" on the vendor's site.

OESA-2026-2574 (samba) — Patched: `4.17.5-15.oe2203sp4` — 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 samba.

📍 Affected scope

samba — .

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure

🔧 How to fix

Update to **4.17.5-15.oe2203sp4**.

🛡️ 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 'samba' .` 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

1
Identify exposure identify
```
grep -r 'samba' . | 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 `samba` を grep し、稼働しているサービス・バージョンを把握する。
6
Apply patch patch
```
Upgrade samba to 4.17.5-15.oe2203sp4
```
ステージング環境で 4.17.5-15.oe2203sp4 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。
7
Post-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

openEuler:22.03-LTS-SP4 samba

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.17.5-15.oe2203sp4"}]}]

References

advisory https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2574
advisory https://nvd.nist.gov/vuln/detail/CVE-2026-3012
advisory https://nvd.nist.gov/vuln/detail/CVE-2026-3238
advisory https://nvd.nist.gov/vuln/detail/CVE-2026-4408
advisory https://nvd.nist.gov/vuln/detail/CVE-2026-4480