Vulnerability in rustc (USN-8168-2)

Summary

vulnerability in rustc (USN-8168-2). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `1.31.0+dfsg1+llvm-2ubuntu1~14.04.1ubuntu1` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **USN-8168-2** has been found in rustc. Risk of unauthorized operations or information disclosure. CVSS score: ?/10. What to do: upgrade rustc to **1.31.0+dfsg1+llvm-2ubuntu1~14.04.1ubuntu1** or later. If unsure, ask your IT team or search "rustc USN-8168-2" on the vendor's site.

USN-8168-2 (rustc) — Patched: `1.31.0+dfsg1+llvm-2ubuntu1~14.04.1ubuntu1` — 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 rustc.

📍 Affected scope

rustc — .

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure

🔧 How to fix

Update to **1.31.0+dfsg1+llvm-2ubuntu1~14.04.1ubuntu1**.

🛡️ 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 'rustc' .` 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 'rustc' . | 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 `rustc` 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 rustc to 1.31.0+dfsg1+llvm-2ubuntu1~14.04.1ubuntu1
```
ステージング環境で 1.31.0+dfsg1+llvm-2ubuntu1~14.04.1ubuntu1 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

Ubuntu:Pro:14.04:LTS rustc

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.31.0+dfsg1+llvm-2ubuntu1~14.04.1ubuntu1"}]}]

Ubuntu:Pro:16.04:LTS rustc

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.47.0+dfsg1+llvm-1ubuntu1~16.04.1ubuntu2"}]}]

Ubuntu:Pro:18.04:LTS rustc

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.65.0+dfsg0ubuntu1~llvm2-0ubuntu0.18.04.1"}]}]

Ubuntu:Pro:20.04:LTS rustc

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.75.0+dfsg0ubuntu1~bpo0-0ubuntu0.20.04.1"}]}]

Ubuntu:Pro:20.04:LTS rustc-1.76

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.76.0+dfsg0ubuntu1~bpo0-0ubuntu0.20.04.1"}]}]

Ubuntu:Pro:20.04:LTS rustc-1.77

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.77.2+dfsg1ubuntu1~bpo0-0ubuntu0.20.04.1"}]}]

Ubuntu:Pro:20.04:LTS rustc-1.78

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.78.0+dfsg1ubuntu1~bpo0-0ubuntu0.20.04.1"}]}]

Ubuntu:Pro:20.04:LTS rustc-1.79

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.79.0+dfsg1ubuntu1~bpo0-0ubuntu0.20.04.3"}]}]

Ubuntu:Pro:20.04:LTS rustc-1.80

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.80.1+dfsg0ubuntu1~bpo0-0ubuntu0.20.04.1"}]}]

References

advisory https://ubuntu.com/security/notices/USN-8168-2
report https://ubuntu.com/security/CVE-2026-33056